Home / 20,129.21-27,763.85-12,470.00

Finding the Fourth Proportional to 20,129.21, 27,763.85 and 12,470.00

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Solution

The fourth proportional to 20,129.21, 27,763.85 and 12,470.00 is: 17,199.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,129.21 : 27,763.85 = 12,470.00 : x
  2. Step 2: Convert to fraction form
    20,129.21/27,763.85 = 12,470.00/x
  3. Step 3: Cross multiply
    20,129.21x = 27,763.85 × 12,470.00
  4. Step 4: Simplify right side
    20,129.21x = 346,215,008.33
  5. Step 5: Solve for x
    x = 346,215,008.33/20,129.21
  6. Step 6: Final answer
    x = 17,199.64

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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.