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Finding the Fourth Proportional to 38,618.70, 57,929.13 and 13,655.22

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Solution

The fourth proportional to 38,618.70, 57,929.13 and 13,655.22 is: 20,483.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,618.70 : 57,929.13 = 13,655.22 : x
  2. Step 2: Convert to fraction form
    38,618.70/57,929.13 = 13,655.22/x
  3. Step 3: Cross multiply
    38,618.70x = 57,929.13 × 13,655.22
  4. Step 4: Simplify right side
    38,618.70x = 791,035,014.56
  5. Step 5: Solve for x
    x = 791,035,014.56/38,618.70
  6. Step 6: Final answer
    x = 20,483.21

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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.