Home / 28,213.60-38,934.72-15,638.56

Finding the Fourth Proportional to 28,213.60, 38,934.72 and 15,638.56

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Solution

The fourth proportional to 28,213.60, 38,934.72 and 15,638.56 is: 21,581.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,213.60 : 38,934.72 = 15,638.56 : x
  2. Step 2: Convert to fraction form
    28,213.60/38,934.72 = 15,638.56/x
  3. Step 3: Cross multiply
    28,213.60x = 38,934.72 × 15,638.56
  4. Step 4: Simplify right side
    28,213.60x = 608,882,954.80
  5. Step 5: Solve for x
    x = 608,882,954.80/28,213.60
  6. Step 6: Final answer
    x = 21,581.19

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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.