Home / 20,792.40-28,701.72-12,837.84

Finding the Fourth Proportional to 20,792.40, 28,701.72 and 12,837.84

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Solution

The fourth proportional to 20,792.40, 28,701.72 and 12,837.84 is: 17,721.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,792.40 : 28,701.72 = 12,837.84 : x
  2. Step 2: Convert to fraction form
    20,792.40/28,701.72 = 12,837.84/x
  3. Step 3: Cross multiply
    20,792.40x = 28,701.72 × 12,837.84
  4. Step 4: Simplify right side
    20,792.40x = 368,468,089.08
  5. Step 5: Solve for x
    x = 368,468,089.08/20,792.40
  6. Step 6: Final answer
    x = 17,721.29

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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.