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Finding the Fourth Proportional to 20,569.57, 30,854.25 and 4,987.20

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Solution

The fourth proportional to 20,569.57, 30,854.25 and 4,987.20 is: 7,480.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,569.57 : 30,854.25 = 4,987.20 : x
  2. Step 2: Convert to fraction form
    20,569.57/30,854.25 = 4,987.20/x
  3. Step 3: Cross multiply
    20,569.57x = 30,854.25 × 4,987.20
  4. Step 4: Simplify right side
    20,569.57x = 153,876,315.60
  5. Step 5: Solve for x
    x = 153,876,315.60/20,569.57
  6. Step 6: Final answer
    x = 7,480.77

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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.