Home / 21,209.76-29,267.28-11,777.28

Finding the Fourth Proportional to 21,209.76, 29,267.28 and 11,777.28

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Solution

The fourth proportional to 21,209.76, 29,267.28 and 11,777.28 is: 16,251.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,209.76 : 29,267.28 = 11,777.28 : x
  2. Step 2: Convert to fraction form
    21,209.76/29,267.28 = 11,777.28/x
  3. Step 3: Cross multiply
    21,209.76x = 29,267.28 × 11,777.28
  4. Step 4: Simplify right side
    21,209.76x = 344,688,951.40
  5. Step 5: Solve for x
    x = 344,688,951.40/21,209.76
  6. Step 6: Final answer
    x = 16,251.43

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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.