Home / 21,692.64-29,920.56-13,313.76

Finding the Fourth Proportional to 21,692.64, 29,920.56 and 13,313.76

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Solution

The fourth proportional to 21,692.64, 29,920.56 and 13,313.76 is: 18,363.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,692.64 : 29,920.56 = 13,313.76 : x
  2. Step 2: Convert to fraction form
    21,692.64/29,920.56 = 13,313.76/x
  3. Step 3: Cross multiply
    21,692.64x = 29,920.56 × 13,313.76
  4. Step 4: Simplify right side
    21,692.64x = 398,355,154.91
  5. Step 5: Solve for x
    x = 398,355,154.91/21,692.64
  6. Step 6: Final answer
    x = 18,363.61

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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.