Home / 28,220.92-38,945.80-15,475.12

Finding the Fourth Proportional to 28,220.92, 38,945.80 and 15,475.12

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Solution

The fourth proportional to 28,220.92, 38,945.80 and 15,475.12 is: 21,356.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,220.92 : 38,945.80 = 15,475.12 : x
  2. Step 2: Convert to fraction form
    28,220.92/38,945.80 = 15,475.12/x
  3. Step 3: Cross multiply
    28,220.92x = 38,945.80 × 15,475.12
  4. Step 4: Simplify right side
    28,220.92x = 602,690,928.50
  5. Step 5: Solve for x
    x = 602,690,928.50/28,220.92
  6. Step 6: Final answer
    x = 21,356.18

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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.