Home / 20,538.40-28,341.30-11,588.12

Finding the Fourth Proportional to 20,538.40, 28,341.30 and 11,588.12

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Solution

The fourth proportional to 20,538.40, 28,341.30 and 11,588.12 is: 15,990.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,538.40 : 28,341.30 = 11,588.12 : x
  2. Step 2: Convert to fraction form
    20,538.40/28,341.30 = 11,588.12/x
  3. Step 3: Cross multiply
    20,538.40x = 28,341.30 × 11,588.12
  4. Step 4: Simplify right side
    20,538.40x = 328,422,385.36
  5. Step 5: Solve for x
    x = 328,422,385.36/20,538.40
  6. Step 6: Final answer
    x = 15,990.65

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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.