Home / 9,139.23-12,610.89-5,159.70

Finding the Fourth Proportional to 9,139.23, 12,610.89 and 5,159.70

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Solution

The fourth proportional to 9,139.23, 12,610.89 and 5,159.70 is: 7,119.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,139.23 : 12,610.89 = 5,159.70 : x
  2. Step 2: Convert to fraction form
    9,139.23/12,610.89 = 5,159.70/x
  3. Step 3: Cross multiply
    9,139.23x = 12,610.89 × 5,159.70
  4. Step 4: Simplify right side
    9,139.23x = 65,068,409.13
  5. Step 5: Solve for x
    x = 65,068,409.13/9,139.23
  6. Step 6: Final answer
    x = 7,119.68

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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.