Home / 20,281.29-27,985.19-11,900.49

Finding the Fourth Proportional to 20,281.29, 27,985.19 and 11,900.49

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Solution

The fourth proportional to 20,281.29, 27,985.19 and 11,900.49 is: 16,420.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,281.29 : 27,985.19 = 11,900.49 : x
  2. Step 2: Convert to fraction form
    20,281.29/27,985.19 = 11,900.49/x
  3. Step 3: Cross multiply
    20,281.29x = 27,985.19 × 11,900.49
  4. Step 4: Simplify right side
    20,281.29x = 333,037,414.24
  5. Step 5: Solve for x
    x = 333,037,414.24/20,281.29
  6. Step 6: Final answer
    x = 16,420.92

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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.