Home / 15,286.18-21,104.13-9,989.86

Finding the Fourth Proportional to 15,286.18, 21,104.13 and 9,989.86

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Solution

The fourth proportional to 15,286.18, 21,104.13 and 9,989.86 is: 13,792.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,286.18 : 21,104.13 = 9,989.86 : x
  2. Step 2: Convert to fraction form
    15,286.18/21,104.13 = 9,989.86/x
  3. Step 3: Cross multiply
    15,286.18x = 21,104.13 × 9,989.86
  4. Step 4: Simplify right side
    15,286.18x = 210,827,304.12
  5. Step 5: Solve for x
    x = 210,827,304.12/15,286.18
  6. Step 6: Final answer
    x = 13,792.02

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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.