Home / 28,147.50-38,844.78-15,572.28

Finding the Fourth Proportional to 28,147.50, 38,844.78 and 15,572.28

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Solution

The fourth proportional to 28,147.50, 38,844.78 and 15,572.28 is: 21,490.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,147.50 : 38,844.78 = 15,572.28 : x
  2. Step 2: Convert to fraction form
    28,147.50/38,844.78 = 15,572.28/x
  3. Step 3: Cross multiply
    28,147.50x = 38,844.78 × 15,572.28
  4. Step 4: Simplify right side
    28,147.50x = 604,901,790.70
  5. Step 5: Solve for x
    x = 604,901,790.70/28,147.50
  6. Step 6: Final answer
    x = 21,490.43

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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.