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Finding the Fourth Proportional to 17,920.80, 24,721.24 and 10,648.76

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Solution

The fourth proportional to 17,920.80, 24,721.24 and 10,648.76 is: 14,689.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,920.80 : 24,721.24 = 10,648.76 : x
  2. Step 2: Convert to fraction form
    17,920.80/24,721.24 = 10,648.76/x
  3. Step 3: Cross multiply
    17,920.80x = 24,721.24 × 10,648.76
  4. Step 4: Simplify right side
    17,920.80x = 263,250,551.66
  5. Step 5: Solve for x
    x = 263,250,551.66/17,920.80
  6. Step 6: Final answer
    x = 14,689.67

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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.