Home / 28,129.71-42,215.34-13,338.68

Finding the Fourth Proportional to 28,129.71, 42,215.34 and 13,338.68

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Solution

The fourth proportional to 28,129.71, 42,215.34 and 13,338.68 is: 20,017.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,129.71 : 42,215.34 = 13,338.68 : x
  2. Step 2: Convert to fraction form
    28,129.71/42,215.34 = 13,338.68/x
  3. Step 3: Cross multiply
    28,129.71x = 42,215.34 × 13,338.68
  4. Step 4: Simplify right side
    28,129.71x = 563,096,912.73
  5. Step 5: Solve for x
    x = 563,096,912.73/28,129.71
  6. Step 6: Final answer
    x = 20,017.87

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1.5x scale

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.