Home / 20,528.71-28,310.73-12,961.96

Finding the Fourth Proportional to 20,528.71, 28,310.73 and 12,961.96

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Solution

The fourth proportional to 20,528.71, 28,310.73 and 12,961.96 is: 17,875.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,528.71 : 28,310.73 = 12,961.96 : x
  2. Step 2: Convert to fraction form
    20,528.71/28,310.73 = 12,961.96/x
  3. Step 3: Cross multiply
    20,528.71x = 28,310.73 × 12,961.96
  4. Step 4: Simplify right side
    20,528.71x = 366,962,549.83
  5. Step 5: Solve for x
    x = 366,962,549.83/20,528.71
  6. Step 6: Final answer
    x = 17,875.58

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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.