Home / 20,572.28-30,858.12-4,990.04

Finding the Fourth Proportional to 20,572.28, 30,858.12 and 4,990.04

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Solution

The fourth proportional to 20,572.28, 30,858.12 and 4,990.04 is: 7,484.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,572.28 : 30,858.12 = 4,990.04 : x
  2. Step 2: Convert to fraction form
    20,572.28/30,858.12 = 4,990.04/x
  3. Step 3: Cross multiply
    20,572.28x = 30,858.12 × 4,990.04
  4. Step 4: Simplify right side
    20,572.28x = 153,983,253.12
  5. Step 5: Solve for x
    x = 153,983,253.12/20,572.28
  6. Step 6: Final answer
    x = 7,484.99

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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.