Home / 13,126.77-18,114.60-7,158.55

Finding the Fourth Proportional to 13,126.77, 18,114.60 and 7,158.55

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Solution

The fourth proportional to 13,126.77, 18,114.60 and 7,158.55 is: 9,878.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,126.77 : 18,114.60 = 7,158.55 : x
  2. Step 2: Convert to fraction form
    13,126.77/18,114.60 = 7,158.55/x
  3. Step 3: Cross multiply
    13,126.77x = 18,114.60 × 7,158.55
  4. Step 4: Simplify right side
    13,126.77x = 129,674,269.83
  5. Step 5: Solve for x
    x = 129,674,269.83/13,126.77
  6. Step 6: Final answer
    x = 9,878.61

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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.