Home / 20,990.01-28,962.75-13,042.98

Finding the Fourth Proportional to 20,990.01, 28,962.75 and 13,042.98

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Solution

The fourth proportional to 20,990.01, 28,962.75 and 13,042.98 is: 17,997.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,990.01 : 28,962.75 = 13,042.98 : x
  2. Step 2: Convert to fraction form
    20,990.01/28,962.75 = 13,042.98/x
  3. Step 3: Cross multiply
    20,990.01x = 28,962.75 × 13,042.98
  4. Step 4: Simplify right side
    20,990.01x = 377,760,569.00
  5. Step 5: Solve for x
    x = 377,760,569.00/20,990.01
  6. Step 6: Final answer
    x = 17,997.16

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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.