Home / 15,865.98-21,898.96-9,155.60

Finding the Fourth Proportional to 15,865.98, 21,898.96 and 9,155.60

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Solution

The fourth proportional to 15,865.98, 21,898.96 and 9,155.60 is: 12,636.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,865.98 : 21,898.96 = 9,155.60 : x
  2. Step 2: Convert to fraction form
    15,865.98/21,898.96 = 9,155.60/x
  3. Step 3: Cross multiply
    15,865.98x = 21,898.96 × 9,155.60
  4. Step 4: Simplify right side
    15,865.98x = 200,498,067.91
  5. Step 5: Solve for x
    x = 200,498,067.91/15,865.98
  6. Step 6: Final answer
    x = 12,636.98

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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.