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Finding the Fourth Proportional to 14,191.70, 21,287.55 and 8,047.70

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Solution

The fourth proportional to 14,191.70, 21,287.55 and 8,047.70 is: 12,071.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,191.70 : 21,287.55 = 8,047.70 : x
  2. Step 2: Convert to fraction form
    14,191.70/21,287.55 = 8,047.70/x
  3. Step 3: Cross multiply
    14,191.70x = 21,287.55 × 8,047.70
  4. Step 4: Simplify right side
    14,191.70x = 171,315,816.14
  5. Step 5: Solve for x
    x = 171,315,816.14/14,191.70
  6. Step 6: Final answer
    x = 12,071.55

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.