Home / 20,570.28-30,855.12-4,988.04

Finding the Fourth Proportional to 20,570.28, 30,855.12 and 4,988.04

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Solution

The fourth proportional to 20,570.28, 30,855.12 and 4,988.04 is: 7,481.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,570.28 : 30,855.12 = 4,988.04 : x
  2. Step 2: Convert to fraction form
    20,570.28/30,855.12 = 4,988.04/x
  3. Step 3: Cross multiply
    20,570.28x = 30,855.12 × 4,988.04
  4. Step 4: Simplify right side
    20,570.28x = 153,906,572.76
  5. Step 5: Solve for x
    x = 153,906,572.76/20,570.28
  6. Step 6: Final answer
    x = 7,481.99

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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.