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Finding the Fourth Proportional to 25,359, 38,037.78 and 11,315.40

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Solution

The fourth proportional to 25,359, 38,037.78 and 11,315.40 is: 16,972.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,359 : 38,037.78 = 11,315.40 : x
  2. Step 2: Convert to fraction form
    25,359/38,037.78 = 11,315.40/x
  3. Step 3: Cross multiply
    25,359x = 38,037.78 × 11,315.40
  4. Step 4: Simplify right side
    25,359x = 430,412,695.81
  5. Step 5: Solve for x
    x = 430,412,695.81/25,359
  6. Step 6: Final answer
    x = 16,972.78

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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.