Home / 20,141.30-27,798.95-12,868.72

Finding the Fourth Proportional to 20,141.30, 27,798.95 and 12,868.72

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Solution

The fourth proportional to 20,141.30, 27,798.95 and 12,868.72 is: 17,761.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,141.30 : 27,798.95 = 12,868.72 : x
  2. Step 2: Convert to fraction form
    20,141.30/27,798.95 = 12,868.72/x
  3. Step 3: Cross multiply
    20,141.30x = 27,798.95 × 12,868.72
  4. Step 4: Simplify right side
    20,141.30x = 357,736,903.84
  5. Step 5: Solve for x
    x = 357,736,903.84/20,141.30
  6. Step 6: Final answer
    x = 17,761.36

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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.