Home / 28,001.12-38,640.16-15,423.52

Finding the Fourth Proportional to 28,001.12, 38,640.16 and 15,423.52

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Solution

The fourth proportional to 28,001.12, 38,640.16 and 15,423.52 is: 21,283.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,001.12 : 38,640.16 = 15,423.52 : x
  2. Step 2: Convert to fraction form
    28,001.12/38,640.16 = 15,423.52/x
  3. Step 3: Cross multiply
    28,001.12x = 38,640.16 × 15,423.52
  4. Step 4: Simplify right side
    28,001.12x = 595,967,280.56
  5. Step 5: Solve for x
    x = 595,967,280.56/28,001.12
  6. Step 6: Final answer
    x = 21,283.69

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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.