Home / 12,708.78-17,538.60-7,402.74

Finding the Fourth Proportional to 12,708.78, 17,538.60 and 7,402.74

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Solution

The fourth proportional to 12,708.78, 17,538.60 and 7,402.74 is: 10,216.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,708.78 : 17,538.60 = 7,402.74 : x
  2. Step 2: Convert to fraction form
    12,708.78/17,538.60 = 7,402.74/x
  3. Step 3: Cross multiply
    12,708.78x = 17,538.60 × 7,402.74
  4. Step 4: Simplify right side
    12,708.78x = 129,833,695.76
  5. Step 5: Solve for x
    x = 129,833,695.76/12,708.78
  6. Step 6: Final answer
    x = 10,216.06

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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.