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Finding the Fourth Proportional to 18,909.76, 26,076.12 and 12,534.14

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Solution

The fourth proportional to 18,909.76, 26,076.12 and 12,534.14 is: 17,284.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,909.76 : 26,076.12 = 12,534.14 : x
  2. Step 2: Convert to fraction form
    18,909.76/26,076.12 = 12,534.14/x
  3. Step 3: Cross multiply
    18,909.76x = 26,076.12 × 12,534.14
  4. Step 4: Simplify right side
    18,909.76x = 326,841,738.74
  5. Step 5: Solve for x
    x = 326,841,738.74/18,909.76
  6. Step 6: Final answer
    x = 17,284.29

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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.