Home / 13,147.18-18,142.38-7,177.66

Finding the Fourth Proportional to 13,147.18, 18,142.38 and 7,177.66

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Solution

The fourth proportional to 13,147.18, 18,142.38 and 7,177.66 is: 9,904.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,147.18 : 18,142.38 = 7,177.66 : x
  2. Step 2: Convert to fraction form
    13,147.18/18,142.38 = 7,177.66/x
  3. Step 3: Cross multiply
    13,147.18x = 18,142.38 × 7,177.66
  4. Step 4: Simplify right side
    13,147.18x = 130,219,835.23
  5. Step 5: Solve for x
    x = 130,219,835.23/13,147.18
  6. Step 6: Final answer
    x = 9,904.77

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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.