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Finding the Fourth Proportional to 15,833.20, 21,848.88 and 8,759.20

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Solution

The fourth proportional to 15,833.20, 21,848.88 and 8,759.20 is: 12,087.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,833.20 : 21,848.88 = 8,759.20 : x
  2. Step 2: Convert to fraction form
    15,833.20/21,848.88 = 8,759.20/x
  3. Step 3: Cross multiply
    15,833.20x = 21,848.88 × 8,759.20
  4. Step 4: Simplify right side
    15,833.20x = 191,378,709.70
  5. Step 5: Solve for x
    x = 191,378,709.70/15,833.20
  6. Step 6: Final answer
    x = 12,087.18

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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.