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Finding the Fourth Proportional to 13,135.95, 18,127.08 and 7,167.47

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Solution

The fourth proportional to 13,135.95, 18,127.08 and 7,167.47 is: 9,890.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,135.95 : 18,127.08 = 7,167.47 : x
  2. Step 2: Convert to fraction form
    13,135.95/18,127.08 = 7,167.47/x
  3. Step 3: Cross multiply
    13,135.95x = 18,127.08 × 7,167.47
  4. Step 4: Simplify right side
    13,135.95x = 129,925,211.45
  5. Step 5: Solve for x
    x = 129,925,211.45/13,135.95
  6. Step 6: Final answer
    x = 9,890.81

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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.