Home / 28,112.16-42,175.17-19,808.40

Finding the Fourth Proportional to 28,112.16, 42,175.17 and 19,808.40

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Solution

The fourth proportional to 28,112.16, 42,175.17 and 19,808.40 is: 29,717.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,112.16 : 42,175.17 = 19,808.40 : x
  2. Step 2: Convert to fraction form
    28,112.16/42,175.17 = 19,808.40/x
  3. Step 3: Cross multiply
    28,112.16x = 42,175.17 × 19,808.40
  4. Step 4: Simplify right side
    28,112.16x = 835,422,404.99
  5. Step 5: Solve for x
    x = 835,422,404.99/28,112.16
  6. Step 6: Final answer
    x = 29,717.47

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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.