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Finding the Fourth Proportional to 21,049.92, 29,047.05 and 13,482.90

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Solution

The fourth proportional to 21,049.92, 29,047.05 and 13,482.90 is: 18,605.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,049.92 : 29,047.05 = 13,482.90 : x
  2. Step 2: Convert to fraction form
    21,049.92/29,047.05 = 13,482.90/x
  3. Step 3: Cross multiply
    21,049.92x = 29,047.05 × 13,482.90
  4. Step 4: Simplify right side
    21,049.92x = 391,638,470.45
  5. Step 5: Solve for x
    x = 391,638,470.45/21,049.92
  6. Step 6: Final answer
    x = 18,605.22

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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.