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Finding the Fourth Proportional to 25,399.71, 38,099.79 and 6,931.71

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Solution

The fourth proportional to 25,399.71, 38,099.79 and 6,931.71 is: 10,397.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,399.71 : 38,099.79 = 6,931.71 : x
  2. Step 2: Convert to fraction form
    25,399.71/38,099.79 = 6,931.71/x
  3. Step 3: Cross multiply
    25,399.71x = 38,099.79 × 6,931.71
  4. Step 4: Simplify right side
    25,399.71x = 264,096,695.34
  5. Step 5: Solve for x
    x = 264,096,695.34/25,399.71
  6. Step 6: Final answer
    x = 10,397.63

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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.