Home / 15,862.18-21,890.10-9,578.20

Finding the Fourth Proportional to 15,862.18, 21,890.10 and 9,578.20

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Solution

The fourth proportional to 15,862.18, 21,890.10 and 9,578.20 is: 13,218.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,862.18 : 21,890.10 = 9,578.20 : x
  2. Step 2: Convert to fraction form
    15,862.18/21,890.10 = 9,578.20/x
  3. Step 3: Cross multiply
    15,862.18x = 21,890.10 × 9,578.20
  4. Step 4: Simplify right side
    15,862.18x = 209,667,755.82
  5. Step 5: Solve for x
    x = 209,667,755.82/15,862.18
  6. Step 6: Final answer
    x = 13,218.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.