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Finding the Fourth Proportional to 14,114.70, 21,159.90 and 7,189.20

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Solution

The fourth proportional to 14,114.70, 21,159.90 and 7,189.20 is: 10,777.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,114.70 : 21,159.90 = 7,189.20 : x
  2. Step 2: Convert to fraction form
    14,114.70/21,159.90 = 7,189.20/x
  3. Step 3: Cross multiply
    14,114.70x = 21,159.90 × 7,189.20
  4. Step 4: Simplify right side
    14,114.70x = 152,122,753.08
  5. Step 5: Solve for x
    x = 152,122,753.08/14,114.70
  6. Step 6: Final answer
    x = 10,777.61

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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.