Home / 18,931.20-26,123.99-10,431.66

Finding the Fourth Proportional to 18,931.20, 26,123.99 and 10,431.66

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Solution

The fourth proportional to 18,931.20, 26,123.99 and 10,431.66 is: 14,395.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,931.20 : 26,123.99 = 10,431.66 : x
  2. Step 2: Convert to fraction form
    18,931.20/26,123.99 = 10,431.66/x
  3. Step 3: Cross multiply
    18,931.20x = 26,123.99 × 10,431.66
  4. Step 4: Simplify right side
    18,931.20x = 272,516,581.52
  5. Step 5: Solve for x
    x = 272,516,581.52/18,931.20
  6. Step 6: Final answer
    x = 14,395.10

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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.