Home / 28,139.88-42,193.83-11,480.40

Finding the Fourth Proportional to 28,139.88, 42,193.83 and 11,480.40

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Solution

The fourth proportional to 28,139.88, 42,193.83 and 11,480.40 is: 17,214.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,139.88 : 42,193.83 = 11,480.40 : x
  2. Step 2: Convert to fraction form
    28,139.88/42,193.83 = 11,480.40/x
  3. Step 3: Cross multiply
    28,139.88x = 42,193.83 × 11,480.40
  4. Step 4: Simplify right side
    28,139.88x = 484,402,045.93
  5. Step 5: Solve for x
    x = 484,402,045.93/28,139.88
  6. Step 6: Final answer
    x = 17,214.08

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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.