Home / 15,158.45-20,920.20-8,445.17

Finding the Fourth Proportional to 15,158.45, 20,920.20 and 8,445.17

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Solution

The fourth proportional to 15,158.45, 20,920.20 and 8,445.17 is: 11,655.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,158.45 : 20,920.20 = 8,445.17 : x
  2. Step 2: Convert to fraction form
    15,158.45/20,920.20 = 8,445.17/x
  3. Step 3: Cross multiply
    15,158.45x = 20,920.20 × 8,445.17
  4. Step 4: Simplify right side
    15,158.45x = 176,674,645.43
  5. Step 5: Solve for x
    x = 176,674,645.43/15,158.45
  6. Step 6: Final answer
    x = 11,655.19

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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.