Home / 21,677.28-29,916.72-13,178.76

Finding the Fourth Proportional to 21,677.28, 29,916.72 and 13,178.76

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Solution

The fourth proportional to 21,677.28, 29,916.72 and 13,178.76 is: 18,187.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,677.28 : 29,916.72 = 13,178.76 : x
  2. Step 2: Convert to fraction form
    21,677.28/29,916.72 = 13,178.76/x
  3. Step 3: Cross multiply
    21,677.28x = 29,916.72 × 13,178.76
  4. Step 4: Simplify right side
    21,677.28x = 394,265,272.87
  5. Step 5: Solve for x
    x = 394,265,272.87/21,677.28
  6. Step 6: Final answer
    x = 18,187.95

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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.