Home / 13,147.08-18,142.28-7,177.59

Finding the Fourth Proportional to 13,147.08, 18,142.28 and 7,177.59

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Solution

The fourth proportional to 13,147.08, 18,142.28 and 7,177.59 is: 9,904.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,147.08 : 18,142.28 = 7,177.59 : x
  2. Step 2: Convert to fraction form
    13,147.08/18,142.28 = 7,177.59/x
  3. Step 3: Cross multiply
    13,147.08x = 18,142.28 × 7,177.59
  4. Step 4: Simplify right side
    13,147.08x = 130,217,811.62
  5. Step 5: Solve for x
    x = 130,217,811.62/13,147.08
  6. Step 6: Final answer
    x = 9,904.69

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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.