Home / 21,543.67-29,729.91-12,112.21

Finding the Fourth Proportional to 21,543.67, 29,729.91 and 12,112.21

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Solution

The fourth proportional to 21,543.67, 29,729.91 and 12,112.21 is: 16,714.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,543.67 : 29,729.91 = 12,112.21 : x
  2. Step 2: Convert to fraction form
    21,543.67/29,729.91 = 12,112.21/x
  3. Step 3: Cross multiply
    21,543.67x = 29,729.91 × 12,112.21
  4. Step 4: Simplify right side
    21,543.67x = 360,094,913.20
  5. Step 5: Solve for x
    x = 360,094,913.20/21,543.67
  6. Step 6: Final answer
    x = 16,714.65

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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.