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Finding the Fourth Proportional to 28,534.80, 42,802.20 and 20,224.20

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Solution

The fourth proportional to 28,534.80, 42,802.20 and 20,224.20 is: 30,336.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,534.80 : 42,802.20 = 20,224.20 : x
  2. Step 2: Convert to fraction form
    28,534.80/42,802.20 = 20,224.20/x
  3. Step 3: Cross multiply
    28,534.80x = 42,802.20 × 20,224.20
  4. Step 4: Simplify right side
    28,534.80x = 865,640,253.24
  5. Step 5: Solve for x
    x = 865,640,253.24/28,534.80
  6. Step 6: Final answer
    x = 30,336.30

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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.