Home / 15,079.88-20,812.62-9,112.40

Finding the Fourth Proportional to 15,079.88, 20,812.62 and 9,112.40

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Solution

The fourth proportional to 15,079.88, 20,812.62 and 9,112.40 is: 12,576.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,079.88 : 20,812.62 = 9,112.40 : x
  2. Step 2: Convert to fraction form
    15,079.88/20,812.62 = 9,112.40/x
  3. Step 3: Cross multiply
    15,079.88x = 20,812.62 × 9,112.40
  4. Step 4: Simplify right side
    15,079.88x = 189,652,814.42
  5. Step 5: Solve for x
    x = 189,652,814.42/15,079.88
  6. Step 6: Final answer
    x = 12,576.55

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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.