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Finding the Fourth Proportional to 19,761.76, 29,643.36 and 13,506.88

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Solution

The fourth proportional to 19,761.76, 29,643.36 and 13,506.88 is: 20,260.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,761.76 : 29,643.36 = 13,506.88 : x
  2. Step 2: Convert to fraction form
    19,761.76/29,643.36 = 13,506.88/x
  3. Step 3: Cross multiply
    19,761.76x = 29,643.36 × 13,506.88
  4. Step 4: Simplify right side
    19,761.76x = 400,389,306.32
  5. Step 5: Solve for x
    x = 400,389,306.32/19,761.76
  6. Step 6: Final answer
    x = 20,260.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.