Home / 21,101.40-29,123.52-12,154.08

Finding the Fourth Proportional to 21,101.40, 29,123.52 and 12,154.08

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Solution

The fourth proportional to 21,101.40, 29,123.52 and 12,154.08 is: 16,774.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,101.40 : 29,123.52 = 12,154.08 : x
  2. Step 2: Convert to fraction form
    21,101.40/29,123.52 = 12,154.08/x
  3. Step 3: Cross multiply
    21,101.40x = 29,123.52 × 12,154.08
  4. Step 4: Simplify right side
    21,101.40x = 353,969,591.96
  5. Step 5: Solve for x
    x = 353,969,591.96/21,101.40
  6. Step 6: Final answer
    x = 16,774.70

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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.