Home / 15,506.39-21,398.96-9,217.55

Finding the Fourth Proportional to 15,506.39, 21,398.96 and 9,217.55

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Solution

The fourth proportional to 15,506.39, 21,398.96 and 9,217.55 is: 12,720.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,506.39 : 21,398.96 = 9,217.55 : x
  2. Step 2: Convert to fraction form
    15,506.39/21,398.96 = 9,217.55/x
  3. Step 3: Cross multiply
    15,506.39x = 21,398.96 × 9,217.55
  4. Step 4: Simplify right side
    15,506.39x = 197,245,914.00
  5. Step 5: Solve for x
    x = 197,245,914.00/15,506.39
  6. Step 6: Final answer
    x = 12,720.30

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Double scale
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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.