Home / 12,739.29-17,581.08-7,362.78

Finding the Fourth Proportional to 12,739.29, 17,581.08 and 7,362.78

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Solution

The fourth proportional to 12,739.29, 17,581.08 and 7,362.78 is: 10,161.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,739.29 : 17,581.08 = 7,362.78 : x
  2. Step 2: Convert to fraction form
    12,739.29/17,581.08 = 7,362.78/x
  3. Step 3: Cross multiply
    12,739.29x = 17,581.08 × 7,362.78
  4. Step 4: Simplify right side
    12,739.29x = 129,445,624.20
  5. Step 5: Solve for x
    x = 129,445,624.20/12,739.29
  6. Step 6: Final answer
    x = 10,161.13

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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.