Home / 13,135.91-18,127.20-7,167.58

Finding the Fourth Proportional to 13,135.91, 18,127.20 and 7,167.58

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Solution

The fourth proportional to 13,135.91, 18,127.20 and 7,167.58 is: 9,891.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,135.91 : 18,127.20 = 7,167.58 : x
  2. Step 2: Convert to fraction form
    13,135.91/18,127.20 = 7,167.58/x
  3. Step 3: Cross multiply
    13,135.91x = 18,127.20 × 7,167.58
  4. Step 4: Simplify right side
    13,135.91x = 129,928,156.18
  5. Step 5: Solve for x
    x = 129,928,156.18/13,135.91
  6. Step 6: Final answer
    x = 9,891.07

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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.