Home / 13,126.12-18,114.16-7,157.74

Finding the Fourth Proportional to 13,126.12, 18,114.16 and 7,157.74

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Solution

The fourth proportional to 13,126.12, 18,114.16 and 7,157.74 is: 9,877.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,126.12 : 18,114.16 = 7,157.74 : x
  2. Step 2: Convert to fraction form
    13,126.12/18,114.16 = 7,157.74/x
  3. Step 3: Cross multiply
    13,126.12x = 18,114.16 × 7,157.74
  4. Step 4: Simplify right side
    13,126.12x = 129,656,447.60
  5. Step 5: Solve for x
    x = 129,656,447.60/13,126.12
  6. Step 6: Final answer
    x = 9,877.74

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Double scale
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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.