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Finding the Fourth Proportional to 15,159.95, 20,917.95 and 8,445.41

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Solution

The fourth proportional to 15,159.95, 20,917.95 and 8,445.41 is: 11,653.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,159.95 : 20,917.95 = 8,445.41 : x
  2. Step 2: Convert to fraction form
    15,159.95/20,917.95 = 8,445.41/x
  3. Step 3: Cross multiply
    15,159.95x = 20,917.95 × 8,445.41
  4. Step 4: Simplify right side
    15,159.95x = 176,660,664.11
  5. Step 5: Solve for x
    x = 176,660,664.11/15,159.95
  6. Step 6: Final answer
    x = 11,653.12

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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.