Home / 15,153.28-20,909.04-8,438.74

Finding the Fourth Proportional to 15,153.28, 20,909.04 and 8,438.74

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Solution

The fourth proportional to 15,153.28, 20,909.04 and 8,438.74 is: 11,644.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,153.28 : 20,909.04 = 8,438.74 : x
  2. Step 2: Convert to fraction form
    15,153.28/20,909.04 = 8,438.74/x
  3. Step 3: Cross multiply
    15,153.28x = 20,909.04 × 8,438.74
  4. Step 4: Simplify right side
    15,153.28x = 176,445,952.21
  5. Step 5: Solve for x
    x = 176,445,952.21/15,153.28
  6. Step 6: Final answer
    x = 11,644.08

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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.