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Finding the Fourth Proportional to 15,726.96, 21,701.28 and 8,652.96

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Solution

The fourth proportional to 15,726.96, 21,701.28 and 8,652.96 is: 11,940.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,726.96 : 21,701.28 = 8,652.96 : x
  2. Step 2: Convert to fraction form
    15,726.96/21,701.28 = 8,652.96/x
  3. Step 3: Cross multiply
    15,726.96x = 21,701.28 × 8,652.96
  4. Step 4: Simplify right side
    15,726.96x = 187,780,307.79
  5. Step 5: Solve for x
    x = 187,780,307.79/15,726.96
  6. Step 6: Final answer
    x = 11,940.03

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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.