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Finding the Fourth Proportional to 18,948.92, 26,125.14 and 12,970.28

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Solution

The fourth proportional to 18,948.92, 26,125.14 and 12,970.28 is: 17,882.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,948.92 : 26,125.14 = 12,970.28 : x
  2. Step 2: Convert to fraction form
    18,948.92/26,125.14 = 12,970.28/x
  3. Step 3: Cross multiply
    18,948.92x = 26,125.14 × 12,970.28
  4. Step 4: Simplify right side
    18,948.92x = 338,850,380.84
  5. Step 5: Solve for x
    x = 338,850,380.84/18,948.92
  6. Step 6: Final answer
    x = 17,882.31

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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.