Home / 15,339.84-21,170.76-8,625.72

Finding the Fourth Proportional to 15,339.84, 21,170.76 and 8,625.72

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Solution

The fourth proportional to 15,339.84, 21,170.76 and 8,625.72 is: 11,904.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,339.84 : 21,170.76 = 8,625.72 : x
  2. Step 2: Convert to fraction form
    15,339.84/21,170.76 = 8,625.72/x
  3. Step 3: Cross multiply
    15,339.84x = 21,170.76 × 8,625.72
  4. Step 4: Simplify right side
    15,339.84x = 182,613,047.95
  5. Step 5: Solve for x
    x = 182,613,047.95/15,339.84
  6. Step 6: Final answer
    x = 11,904.49

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Half scale
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Double scale
Find fourth proportional to 15,340.84, 21,172.14 and 8,626.72
Similar ratio
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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.