Home / 28,008.12-42,031.58-11,139.40

Finding the Fourth Proportional to 28,008.12, 42,031.58 and 11,139.40

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Solution

The fourth proportional to 28,008.12, 42,031.58 and 11,139.40 is: 16,716.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,008.12 : 42,031.58 = 11,139.40 : x
  2. Step 2: Convert to fraction form
    28,008.12/42,031.58 = 11,139.40/x
  3. Step 3: Cross multiply
    28,008.12x = 42,031.58 × 11,139.40
  4. Step 4: Simplify right side
    28,008.12x = 468,206,421.48
  5. Step 5: Solve for x
    x = 468,206,421.48/28,008.12
  6. Step 6: Final answer
    x = 16,716.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.