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Finding the Fourth Proportional to 20,461.80, 30,692.70 and 15,277.80

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Solution

The fourth proportional to 20,461.80, 30,692.70 and 15,277.80 is: 22,916.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,461.80 : 30,692.70 = 15,277.80 : x
  2. Step 2: Convert to fraction form
    20,461.80/30,692.70 = 15,277.80/x
  3. Step 3: Cross multiply
    20,461.80x = 30,692.70 × 15,277.80
  4. Step 4: Simplify right side
    20,461.80x = 468,916,932.06
  5. Step 5: Solve for x
    x = 468,916,932.06/20,461.80
  6. Step 6: Final answer
    x = 22,916.70

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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.