Home / 28,145.80-42,218.70-11,494.90

Finding the Fourth Proportional to 28,145.80, 42,218.70 and 11,494.90

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Solution

The fourth proportional to 28,145.80, 42,218.70 and 11,494.90 is: 17,242.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,145.80 : 42,218.70 = 11,494.90 : x
  2. Step 2: Convert to fraction form
    28,145.80/42,218.70 = 11,494.90/x
  3. Step 3: Cross multiply
    28,145.80x = 42,218.70 × 11,494.90
  4. Step 4: Simplify right side
    28,145.80x = 485,299,734.63
  5. Step 5: Solve for x
    x = 485,299,734.63/28,145.80
  6. Step 6: Final answer
    x = 17,242.35

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1.5x scale

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.