Home / 15,451.88-21,323.45-8,378.25

Finding the Fourth Proportional to 15,451.88, 21,323.45 and 8,378.25

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Solution

The fourth proportional to 15,451.88, 21,323.45 and 8,378.25 is: 11,561.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,451.88 : 21,323.45 = 8,378.25 : x
  2. Step 2: Convert to fraction form
    15,451.88/21,323.45 = 8,378.25/x
  3. Step 3: Cross multiply
    15,451.88x = 21,323.45 × 8,378.25
  4. Step 4: Simplify right side
    15,451.88x = 178,653,153.07
  5. Step 5: Solve for x
    x = 178,653,153.07/15,451.88
  6. Step 6: Final answer
    x = 11,561.91

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Half scale
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Double scale
Find fourth proportional to 15,452.88, 21,324.82 and 8,379.25
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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.