Home / 13,135.85-18,127.40-7,167.50

Finding the Fourth Proportional to 13,135.85, 18,127.40 and 7,167.50

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Solution

The fourth proportional to 13,135.85, 18,127.40 and 7,167.50 is: 9,891.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,135.85 : 18,127.40 = 7,167.50 : x
  2. Step 2: Convert to fraction form
    13,135.85/18,127.40 = 7,167.50/x
  3. Step 3: Cross multiply
    13,135.85x = 18,127.40 × 7,167.50
  4. Step 4: Simplify right side
    13,135.85x = 129,928,013.03
  5. Step 5: Solve for x
    x = 129,928,013.03/13,135.85
  6. Step 6: Final answer
    x = 9,891.10

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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.