Home / 18,615.39-25,689.38-10,117.55

Finding the Fourth Proportional to 18,615.39, 25,689.38 and 10,117.55

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Solution

The fourth proportional to 18,615.39, 25,689.38 and 10,117.55 is: 13,962.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,615.39 : 25,689.38 = 10,117.55 : x
  2. Step 2: Convert to fraction form
    18,615.39/25,689.38 = 10,117.55/x
  3. Step 3: Cross multiply
    18,615.39x = 25,689.38 × 10,117.55
  4. Step 4: Simplify right side
    18,615.39x = 259,913,407.58
  5. Step 5: Solve for x
    x = 259,913,407.58/18,615.39
  6. Step 6: Final answer
    x = 13,962.29

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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.