Home / 8,700.36-12,008.55-5,165.61

Finding the Fourth Proportional to 8,700.36, 12,008.55 and 5,165.61

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Solution

The fourth proportional to 8,700.36, 12,008.55 and 5,165.61 is: 7,129.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,700.36 : 12,008.55 = 5,165.61 : x
  2. Step 2: Convert to fraction form
    8,700.36/12,008.55 = 5,165.61/x
  3. Step 3: Cross multiply
    8,700.36x = 12,008.55 × 5,165.61
  4. Step 4: Simplify right side
    8,700.36x = 62,031,485.97
  5. Step 5: Solve for x
    x = 62,031,485.97/8,700.36
  6. Step 6: Final answer
    x = 7,129.76

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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.