Home / 15,862.97-21,890.90-8,789.51

Finding the Fourth Proportional to 15,862.97, 21,890.90 and 8,789.51

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Solution

The fourth proportional to 15,862.97, 21,890.90 and 8,789.51 is: 12,129.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,862.97 : 21,890.90 = 8,789.51 : x
  2. Step 2: Convert to fraction form
    15,862.97/21,890.90 = 8,789.51/x
  3. Step 3: Cross multiply
    15,862.97x = 21,890.90 × 8,789.51
  4. Step 4: Simplify right side
    15,862.97x = 192,410,196.98
  5. Step 5: Solve for x
    x = 192,410,196.98/15,862.97
  6. Step 6: Final answer
    x = 12,129.52

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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.