Home / 31,424.02-47,123.67-11,428.76

Finding the Fourth Proportional to 31,424.02, 47,123.67 and 11,428.76

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Solution

The fourth proportional to 31,424.02, 47,123.67 and 11,428.76 is: 17,138.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,424.02 : 47,123.67 = 11,428.76 : x
  2. Step 2: Convert to fraction form
    31,424.02/47,123.67 = 11,428.76/x
  3. Step 3: Cross multiply
    31,424.02x = 47,123.67 × 11,428.76
  4. Step 4: Simplify right side
    31,424.02x = 538,565,275.42
  5. Step 5: Solve for x
    x = 538,565,275.42/31,424.02
  6. Step 6: Final answer
    x = 17,138.65

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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.