Home / 20,480.28-30,721.14-5,689.08

Finding the Fourth Proportional to 20,480.28, 30,721.14 and 5,689.08

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Solution

The fourth proportional to 20,480.28, 30,721.14 and 5,689.08 is: 8,533.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,480.28 : 30,721.14 = 5,689.08 : x
  2. Step 2: Convert to fraction form
    20,480.28/30,721.14 = 5,689.08/x
  3. Step 3: Cross multiply
    20,480.28x = 30,721.14 × 5,689.08
  4. Step 4: Simplify right side
    20,480.28x = 174,775,023.15
  5. Step 5: Solve for x
    x = 174,775,023.15/20,480.28
  6. Step 6: Final answer
    x = 8,533.82

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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.