Home / 86,619.25-129,928.88-20,955.25

Finding the Fourth Proportional to 86,619.25, 129,928.88 and 20,955.25

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Solution

The fourth proportional to 86,619.25, 129,928.88 and 20,955.25 is: 31,432.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,619.25 : 129,928.88 = 20,955.25 : x
  2. Step 2: Convert to fraction form
    86,619.25/129,928.88 = 20,955.25/x
  3. Step 3: Cross multiply
    86,619.25x = 129,928.88 × 20,955.25
  4. Step 4: Simplify right side
    86,619.25x = 2,722,692,162.62
  5. Step 5: Solve for x
    x = 2,722,692,162.62/86,619.25
  6. Step 6: Final answer
    x = 31,432.88

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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.