Home / 15,225.20-21,011.68-8,938.56

Finding the Fourth Proportional to 15,225.20, 21,011.68 and 8,938.56

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Solution

The fourth proportional to 15,225.20, 21,011.68 and 8,938.56 is: 12,335.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,225.20 : 21,011.68 = 8,938.56 : x
  2. Step 2: Convert to fraction form
    15,225.20/21,011.68 = 8,938.56/x
  3. Step 3: Cross multiply
    15,225.20x = 21,011.68 × 8,938.56
  4. Step 4: Simplify right side
    15,225.20x = 187,814,162.38
  5. Step 5: Solve for x
    x = 187,814,162.38/15,225.20
  6. Step 6: Final answer
    x = 12,335.74

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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.