Home / 86,628.13-129,942.20-20,964.13

Finding the Fourth Proportional to 86,628.13, 129,942.20 and 20,964.13

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Solution

The fourth proportional to 86,628.13, 129,942.20 and 20,964.13 is: 31,446.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,628.13 : 129,942.20 = 20,964.13 : x
  2. Step 2: Convert to fraction form
    86,628.13/129,942.20 = 20,964.13/x
  3. Step 3: Cross multiply
    86,628.13x = 129,942.20 × 20,964.13
  4. Step 4: Simplify right side
    86,628.13x = 2,724,125,173.29
  5. Step 5: Solve for x
    x = 2,724,125,173.29/86,628.13
  6. Step 6: Final answer
    x = 31,446.20

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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.