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Finding the Fourth Proportional to 15,854.60, 21,890.04 and 14,170.61

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Solution

The fourth proportional to 15,854.60, 21,890.04 and 14,170.61 is: 19,565.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,854.60 : 21,890.04 = 14,170.61 : x
  2. Step 2: Convert to fraction form
    15,854.60/21,890.04 = 14,170.61/x
  3. Step 3: Cross multiply
    15,854.60x = 21,890.04 × 14,170.61
  4. Step 4: Simplify right side
    15,854.60x = 310,195,219.72
  5. Step 5: Solve for x
    x = 310,195,219.72/15,854.60
  6. Step 6: Final answer
    x = 19,565.00

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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.