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Finding the Fourth Proportional to 22,403.76, 30,916.80 and 12,332.40

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Solution

The fourth proportional to 22,403.76, 30,916.80 and 12,332.40 is: 17,018.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,403.76 : 30,916.80 = 12,332.40 : x
  2. Step 2: Convert to fraction form
    22,403.76/30,916.80 = 12,332.40/x
  3. Step 3: Cross multiply
    22,403.76x = 30,916.80 × 12,332.40
  4. Step 4: Simplify right side
    22,403.76x = 381,278,344.32
  5. Step 5: Solve for x
    x = 381,278,344.32/22,403.76
  6. Step 6: Final answer
    x = 17,018.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.