Home / 28,221.20-38,945.71-15,475.55

Finding the Fourth Proportional to 28,221.20, 38,945.71 and 15,475.55

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Solution

The fourth proportional to 28,221.20, 38,945.71 and 15,475.55 is: 21,356.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,221.20 : 38,945.71 = 15,475.55 : x
  2. Step 2: Convert to fraction form
    28,221.20/38,945.71 = 15,475.55/x
  3. Step 3: Cross multiply
    28,221.20x = 38,945.71 × 15,475.55
  4. Step 4: Simplify right side
    28,221.20x = 602,706,048.97
  5. Step 5: Solve for x
    x = 602,706,048.97/28,221.20
  6. Step 6: Final answer
    x = 21,356.50

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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.