Home / 20,986.76-28,953.04-12,487.18

Finding the Fourth Proportional to 20,986.76, 28,953.04 and 12,487.18

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Solution

The fourth proportional to 20,986.76, 28,953.04 and 12,487.18 is: 17,227.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,986.76 : 28,953.04 = 12,487.18 : x
  2. Step 2: Convert to fraction form
    20,986.76/28,953.04 = 12,487.18/x
  3. Step 3: Cross multiply
    20,986.76x = 28,953.04 × 12,487.18
  4. Step 4: Simplify right side
    20,986.76x = 361,541,822.03
  5. Step 5: Solve for x
    x = 361,541,822.03/20,986.76
  6. Step 6: Final answer
    x = 17,227.14

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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.