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Finding the Fourth Proportional to 15,889.88, 21,927.66 and 8,816.12

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Solution

The fourth proportional to 15,889.88, 21,927.66 and 8,816.12 is: 12,166.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,889.88 : 21,927.66 = 8,816.12 : x
  2. Step 2: Convert to fraction form
    15,889.88/21,927.66 = 8,816.12/x
  3. Step 3: Cross multiply
    15,889.88x = 21,927.66 × 8,816.12
  4. Step 4: Simplify right side
    15,889.88x = 193,316,881.88
  5. Step 5: Solve for x
    x = 193,316,881.88/15,889.88
  6. Step 6: Final answer
    x = 12,166.04

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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.