Home / 20,795.32-28,689.40-12,823.70

Finding the Fourth Proportional to 20,795.32, 28,689.40 and 12,823.70

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Solution

The fourth proportional to 20,795.32, 28,689.40 and 12,823.70 is: 17,691.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,795.32 : 28,689.40 = 12,823.70 : x
  2. Step 2: Convert to fraction form
    20,795.32/28,689.40 = 12,823.70/x
  3. Step 3: Cross multiply
    20,795.32x = 28,689.40 × 12,823.70
  4. Step 4: Simplify right side
    20,795.32x = 367,904,258.78
  5. Step 5: Solve for x
    x = 367,904,258.78/20,795.32
  6. Step 6: Final answer
    x = 17,691.69

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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.