Home / 15,867.80-21,896.80-9,155.59

Finding the Fourth Proportional to 15,867.80, 21,896.80 and 9,155.59

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Solution

The fourth proportional to 15,867.80, 21,896.80 and 9,155.59 is: 12,634.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,867.80 : 21,896.80 = 9,155.59 : x
  2. Step 2: Convert to fraction form
    15,867.80/21,896.80 = 9,155.59/x
  3. Step 3: Cross multiply
    15,867.80x = 21,896.80 × 9,155.59
  4. Step 4: Simplify right side
    15,867.80x = 200,478,123.11
  5. Step 5: Solve for x
    x = 200,478,123.11/15,867.80
  6. Step 6: Final answer
    x = 12,634.27

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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.