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Finding the Fourth Proportional to 25,607.40, 38,411.13 and 12,448.47

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Solution

The fourth proportional to 25,607.40, 38,411.13 and 12,448.47 is: 18,672.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,607.40 : 38,411.13 = 12,448.47 : x
  2. Step 2: Convert to fraction form
    25,607.40/38,411.13 = 12,448.47/x
  3. Step 3: Cross multiply
    25,607.40x = 38,411.13 × 12,448.47
  4. Step 4: Simplify right side
    25,607.40x = 478,159,799.47
  5. Step 5: Solve for x
    x = 478,159,799.47/25,607.40
  6. Step 6: Final answer
    x = 18,672.72

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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.