Home / 20,118.64-27,780.30-13,057.12

Finding the Fourth Proportional to 20,118.64, 27,780.30 and 13,057.12

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Solution

The fourth proportional to 20,118.64, 27,780.30 and 13,057.12 is: 18,029.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,118.64 : 27,780.30 = 13,057.12 : x
  2. Step 2: Convert to fraction form
    20,118.64/27,780.30 = 13,057.12/x
  3. Step 3: Cross multiply
    20,118.64x = 27,780.30 × 13,057.12
  4. Step 4: Simplify right side
    20,118.64x = 362,730,710.74
  5. Step 5: Solve for x
    x = 362,730,710.74/20,118.64
  6. Step 6: Final answer
    x = 18,029.58

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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.