Home / 13,132.68-18,123.12-7,164.28

Finding the Fourth Proportional to 13,132.68, 18,123.12 and 7,164.28

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Solution

The fourth proportional to 13,132.68, 18,123.12 and 7,164.28 is: 9,886.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,132.68 : 18,123.12 = 7,164.28 : x
  2. Step 2: Convert to fraction form
    13,132.68/18,123.12 = 7,164.28/x
  3. Step 3: Cross multiply
    13,132.68x = 18,123.12 × 7,164.28
  4. Step 4: Simplify right side
    13,132.68x = 129,839,106.15
  5. Step 5: Solve for x
    x = 129,839,106.15/13,132.68
  6. Step 6: Final answer
    x = 9,886.72

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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.