Home / 13,124.12-18,111.29-7,155.66

Finding the Fourth Proportional to 13,124.12, 18,111.29 and 7,155.66

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Solution

The fourth proportional to 13,124.12, 18,111.29 and 7,155.66 is: 9,874.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,124.12 : 18,111.29 = 7,155.66 : x
  2. Step 2: Convert to fraction form
    13,124.12/18,111.29 = 7,155.66/x
  3. Step 3: Cross multiply
    13,124.12x = 18,111.29 × 7,155.66
  4. Step 4: Simplify right side
    13,124.12x = 129,598,197.62
  5. Step 5: Solve for x
    x = 129,598,197.62/13,124.12
  6. Step 6: Final answer
    x = 9,874.81

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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.