Home / 13,129.29-18,118.35-7,160.94

Finding the Fourth Proportional to 13,129.29, 18,118.35 and 7,160.94

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Solution

The fourth proportional to 13,129.29, 18,118.35 and 7,160.94 is: 9,882.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,129.29 : 18,118.35 = 7,160.94 : x
  2. Step 2: Convert to fraction form
    13,129.29/18,118.35 = 7,160.94/x
  3. Step 3: Cross multiply
    13,129.29x = 18,118.35 × 7,160.94
  4. Step 4: Simplify right side
    13,129.29x = 129,744,417.25
  5. Step 5: Solve for x
    x = 129,744,417.25/13,129.29
  6. Step 6: Final answer
    x = 9,882.06

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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.