Home / 28,570.29-42,862.28-11,921.09

Finding the Fourth Proportional to 28,570.29, 42,862.28 and 11,921.09

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Solution

The fourth proportional to 28,570.29, 42,862.28 and 11,921.09 is: 17,884.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,570.29 : 42,862.28 = 11,921.09 : x
  2. Step 2: Convert to fraction form
    28,570.29/42,862.28 = 11,921.09/x
  3. Step 3: Cross multiply
    28,570.29x = 42,862.28 × 11,921.09
  4. Step 4: Simplify right side
    28,570.29x = 510,964,823.57
  5. Step 5: Solve for x
    x = 510,964,823.57/28,570.29
  6. Step 6: Final answer
    x = 17,884.48

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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.