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Finding the Fourth Proportional to 14,287.18, 19,725.94 and 8,917.79

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Solution

The fourth proportional to 14,287.18, 19,725.94 and 8,917.79 is: 12,312.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,287.18 : 19,725.94 = 8,917.79 : x
  2. Step 2: Convert to fraction form
    14,287.18/19,725.94 = 8,917.79/x
  3. Step 3: Cross multiply
    14,287.18x = 19,725.94 × 8,917.79
  4. Step 4: Simplify right side
    14,287.18x = 175,911,763.79
  5. Step 5: Solve for x
    x = 175,911,763.79/14,287.18
  6. Step 6: Final answer
    x = 12,312.56

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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.