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Finding the Fourth Proportional to 28,209.80, 42,330.90 and 10,692.20

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Solution

The fourth proportional to 28,209.80, 42,330.90 and 10,692.20 is: 16,044.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,209.80 : 42,330.90 = 10,692.20 : x
  2. Step 2: Convert to fraction form
    28,209.80/42,330.90 = 10,692.20/x
  3. Step 3: Cross multiply
    28,209.80x = 42,330.90 × 10,692.20
  4. Step 4: Simplify right side
    28,209.80x = 452,610,448.98
  5. Step 5: Solve for x
    x = 452,610,448.98/28,209.80
  6. Step 6: Final answer
    x = 16,044.44

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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.