Home / 86,634.13-129,951.20-20,970.13

Finding the Fourth Proportional to 86,634.13, 129,951.20 and 20,970.13

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Solution

The fourth proportional to 86,634.13, 129,951.20 and 20,970.13 is: 31,455.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,634.13 : 129,951.20 = 20,970.13 : x
  2. Step 2: Convert to fraction form
    86,634.13/129,951.20 = 20,970.13/x
  3. Step 3: Cross multiply
    86,634.13x = 129,951.20 × 20,970.13
  4. Step 4: Simplify right side
    86,634.13x = 2,725,093,557.66
  5. Step 5: Solve for x
    x = 2,725,093,557.66/86,634.13
  6. Step 6: Final answer
    x = 31,455.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.