Home / 20,540.34-28,345.21-11,587.61

Finding the Fourth Proportional to 20,540.34, 28,345.21 and 11,587.61

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Solution

The fourth proportional to 20,540.34, 28,345.21 and 11,587.61 is: 15,990.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,540.34 : 28,345.21 = 11,587.61 : x
  2. Step 2: Convert to fraction form
    20,540.34/28,345.21 = 11,587.61/x
  3. Step 3: Cross multiply
    20,540.34x = 28,345.21 × 11,587.61
  4. Step 4: Simplify right side
    20,540.34x = 328,453,280.74
  5. Step 5: Solve for x
    x = 328,453,280.74/20,540.34
  6. Step 6: Final answer
    x = 15,990.64

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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.