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Finding the Fourth Proportional to 20,478.52, 28,282.52 and 15,995.51

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Solution

The fourth proportional to 20,478.52, 28,282.52 and 15,995.51 is: 22,091.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,478.52 : 28,282.52 = 15,995.51 : x
  2. Step 2: Convert to fraction form
    20,478.52/28,282.52 = 15,995.51/x
  3. Step 3: Cross multiply
    20,478.52x = 28,282.52 × 15,995.51
  4. Step 4: Simplify right side
    20,478.52x = 452,393,466.68
  5. Step 5: Solve for x
    x = 452,393,466.68/20,478.52
  6. Step 6: Final answer
    x = 22,091.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.