Home / 28,175.32-42,284.40-10,422.78

Finding the Fourth Proportional to 28,175.32, 42,284.40 and 10,422.78

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Solution

The fourth proportional to 28,175.32, 42,284.40 and 10,422.78 is: 15,642.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,175.32 : 42,284.40 = 10,422.78 : x
  2. Step 2: Convert to fraction form
    28,175.32/42,284.40 = 10,422.78/x
  3. Step 3: Cross multiply
    28,175.32x = 42,284.40 × 10,422.78
  4. Step 4: Simplify right side
    28,175.32x = 440,720,998.63
  5. Step 5: Solve for x
    x = 440,720,998.63/28,175.32
  6. Step 6: Final answer
    x = 15,642.09

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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.