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Finding the Fourth Proportional to 20,995.92, 28,973.16 and 12,610.80

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Solution

The fourth proportional to 20,995.92, 28,973.16 and 12,610.80 is: 17,402.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,995.92 : 28,973.16 = 12,610.80 : x
  2. Step 2: Convert to fraction form
    20,995.92/28,973.16 = 12,610.80/x
  3. Step 3: Cross multiply
    20,995.92x = 28,973.16 × 12,610.80
  4. Step 4: Simplify right side
    20,995.92x = 365,374,726.13
  5. Step 5: Solve for x
    x = 365,374,726.13/20,995.92
  6. Step 6: Final answer
    x = 17,402.18

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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.