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Finding the Fourth Proportional to 10,653.70, 15,980.55 and 8,061.70

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Solution

The fourth proportional to 10,653.70, 15,980.55 and 8,061.70 is: 12,092.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,653.70 : 15,980.55 = 8,061.70 : x
  2. Step 2: Convert to fraction form
    10,653.70/15,980.55 = 8,061.70/x
  3. Step 3: Cross multiply
    10,653.70x = 15,980.55 × 8,061.70
  4. Step 4: Simplify right side
    10,653.70x = 128,830,399.94
  5. Step 5: Solve for x
    x = 128,830,399.94/10,653.70
  6. Step 6: Final answer
    x = 12,092.55

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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.