Home / 20,130.71-27,765.91-12,471.50

Finding the Fourth Proportional to 20,130.71, 27,765.91 and 12,471.50

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Solution

The fourth proportional to 20,130.71, 27,765.91 and 12,471.50 is: 17,201.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,130.71 : 27,765.91 = 12,471.50 : x
  2. Step 2: Convert to fraction form
    20,130.71/27,765.91 = 12,471.50/x
  3. Step 3: Cross multiply
    20,130.71x = 27,765.91 × 12,471.50
  4. Step 4: Simplify right side
    20,130.71x = 346,282,546.57
  5. Step 5: Solve for x
    x = 346,282,546.57/20,130.71
  6. Step 6: Final answer
    x = 17,201.71

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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.