Home / 10,128.47-15,142.77-8,585.73

Finding the Fourth Proportional to 10,128.47, 15,142.77 and 8,585.73

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Solution

The fourth proportional to 10,128.47, 15,142.77 and 8,585.73 is: 12,836.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,128.47 : 15,142.77 = 8,585.73 : x
  2. Step 2: Convert to fraction form
    10,128.47/15,142.77 = 8,585.73/x
  3. Step 3: Cross multiply
    10,128.47x = 15,142.77 × 8,585.73
  4. Step 4: Simplify right side
    10,128.47x = 130,011,734.67
  5. Step 5: Solve for x
    x = 130,011,734.67/10,128.47
  6. Step 6: Final answer
    x = 12,836.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.