Home / 28,439.18-42,640.50-11,810.68

Finding the Fourth Proportional to 28,439.18, 42,640.50 and 11,810.68

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Solution

The fourth proportional to 28,439.18, 42,640.50 and 11,810.68 is: 17,708.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,439.18 : 42,640.50 = 11,810.68 : x
  2. Step 2: Convert to fraction form
    28,439.18/42,640.50 = 11,810.68/x
  3. Step 3: Cross multiply
    28,439.18x = 42,640.50 × 11,810.68
  4. Step 4: Simplify right side
    28,439.18x = 503,613,300.54
  5. Step 5: Solve for x
    x = 503,613,300.54/28,439.18
  6. Step 6: Final answer
    x = 17,708.43

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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.