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Finding the Fourth Proportional to 15,876.60, 21,908.64 and 8,802.76

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Solution

The fourth proportional to 15,876.60, 21,908.64 and 8,802.76 is: 12,147.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,876.60 : 21,908.64 = 8,802.76 : x
  2. Step 2: Convert to fraction form
    15,876.60/21,908.64 = 8,802.76/x
  3. Step 3: Cross multiply
    15,876.60x = 21,908.64 × 8,802.76
  4. Step 4: Simplify right side
    15,876.60x = 192,856,499.85
  5. Step 5: Solve for x
    x = 192,856,499.85/15,876.60
  6. Step 6: Final answer
    x = 12,147.22

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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.