Home / 21,013.90-28,999.31-11,582.46

Finding the Fourth Proportional to 21,013.90, 28,999.31 and 11,582.46

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Solution

The fourth proportional to 21,013.90, 28,999.31 and 11,582.46 is: 15,983.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,013.90 : 28,999.31 = 11,582.46 : x
  2. Step 2: Convert to fraction form
    21,013.90/28,999.31 = 11,582.46/x
  3. Step 3: Cross multiply
    21,013.90x = 28,999.31 × 11,582.46
  4. Step 4: Simplify right side
    21,013.90x = 335,883,348.10
  5. Step 5: Solve for x
    x = 335,883,348.10/21,013.90
  6. Step 6: Final answer
    x = 15,983.87

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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.