Home / 21,720.76-29,976.62-12,291.16

Finding the Fourth Proportional to 21,720.76, 29,976.62 and 12,291.16

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Solution

The fourth proportional to 21,720.76, 29,976.62 and 12,291.16 is: 16,962.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,720.76 : 29,976.62 = 12,291.16 : x
  2. Step 2: Convert to fraction form
    21,720.76/29,976.62 = 12,291.16/x
  3. Step 3: Cross multiply
    21,720.76x = 29,976.62 × 12,291.16
  4. Step 4: Simplify right side
    21,720.76x = 368,447,432.68
  5. Step 5: Solve for x
    x = 368,447,432.68/21,720.76
  6. Step 6: Final answer
    x = 16,962.92

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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.