Home / 20,172.42-27,830.28-12,512.14

Finding the Fourth Proportional to 20,172.42, 27,830.28 and 12,512.14

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Solution

The fourth proportional to 20,172.42, 27,830.28 and 12,512.14 is: 17,262.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,172.42 : 27,830.28 = 12,512.14 : x
  2. Step 2: Convert to fraction form
    20,172.42/27,830.28 = 12,512.14/x
  3. Step 3: Cross multiply
    20,172.42x = 27,830.28 × 12,512.14
  4. Step 4: Simplify right side
    20,172.42x = 348,216,359.60
  5. Step 5: Solve for x
    x = 348,216,359.60/20,172.42
  6. Step 6: Final answer
    x = 17,262.00

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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.