Home / 20,639.28-28,497-12,692.16

Finding the Fourth Proportional to 20,639.28, 28,497 and 12,692.16

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Solution

The fourth proportional to 20,639.28, 28,497 and 12,692.16 is: 17,524.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.28 : 28,497 = 12,692.16 : x
  2. Step 2: Convert to fraction form
    20,639.28/28,497 = 12,692.16/x
  3. Step 3: Cross multiply
    20,639.28x = 28,497 × 12,692.16
  4. Step 4: Simplify right side
    20,639.28x = 361,688,483.52
  5. Step 5: Solve for x
    x = 361,688,483.52/20,639.28
  6. Step 6: Final answer
    x = 17,524.28

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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.