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Finding the Fourth Proportional to 28,337.80, 42,522.90 and 10,820.20

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Solution

The fourth proportional to 28,337.80, 42,522.90 and 10,820.20 is: 16,236.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,337.80 : 42,522.90 = 10,820.20 : x
  2. Step 2: Convert to fraction form
    28,337.80/42,522.90 = 10,820.20/x
  3. Step 3: Cross multiply
    28,337.80x = 42,522.90 × 10,820.20
  4. Step 4: Simplify right side
    28,337.80x = 460,106,282.58
  5. Step 5: Solve for x
    x = 460,106,282.58/28,337.80
  6. Step 6: Final answer
    x = 16,236.49

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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.