Home / 13,517.61-18,648.51-8,478.40

Finding the Fourth Proportional to 13,517.61, 18,648.51 and 8,478.40

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Solution

The fourth proportional to 13,517.61, 18,648.51 and 8,478.40 is: 11,696.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,517.61 : 18,648.51 = 8,478.40 : x
  2. Step 2: Convert to fraction form
    13,517.61/18,648.51 = 8,478.40/x
  3. Step 3: Cross multiply
    13,517.61x = 18,648.51 × 8,478.40
  4. Step 4: Simplify right side
    13,517.61x = 158,109,527.18
  5. Step 5: Solve for x
    x = 158,109,527.18/13,517.61
  6. Step 6: Final answer
    x = 11,696.56

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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.