Home / 20,686.98-28,547.46-11,255.61

Finding the Fourth Proportional to 20,686.98, 28,547.46 and 11,255.61

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Solution

The fourth proportional to 20,686.98, 28,547.46 and 11,255.61 is: 15,532.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,686.98 : 28,547.46 = 11,255.61 : x
  2. Step 2: Convert to fraction form
    20,686.98/28,547.46 = 11,255.61/x
  3. Step 3: Cross multiply
    20,686.98x = 28,547.46 × 11,255.61
  4. Step 4: Simplify right side
    20,686.98x = 321,319,076.25
  5. Step 5: Solve for x
    x = 321,319,076.25/20,686.98
  6. Step 6: Final answer
    x = 15,532.43

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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.