Home / 15,126.90-20,872.58-8,411.65

Finding the Fourth Proportional to 15,126.90, 20,872.58 and 8,411.65

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Solution

The fourth proportional to 15,126.90, 20,872.58 and 8,411.65 is: 11,606.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,126.90 : 20,872.58 = 8,411.65 : x
  2. Step 2: Convert to fraction form
    15,126.90/20,872.58 = 8,411.65/x
  3. Step 3: Cross multiply
    15,126.90x = 20,872.58 × 8,411.65
  4. Step 4: Simplify right side
    15,126.90x = 175,572,769.80
  5. Step 5: Solve for x
    x = 175,572,769.80/15,126.90
  6. Step 6: Final answer
    x = 11,606.66

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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.