Home / 15,459.62-21,334.16-8,386.05

Finding the Fourth Proportional to 15,459.62, 21,334.16 and 8,386.05

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Solution

The fourth proportional to 15,459.62, 21,334.16 and 8,386.05 is: 11,572.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,459.62 : 21,334.16 = 8,386.05 : x
  2. Step 2: Convert to fraction form
    15,459.62/21,334.16 = 8,386.05/x
  3. Step 3: Cross multiply
    15,459.62x = 21,334.16 × 8,386.05
  4. Step 4: Simplify right side
    15,459.62x = 178,909,290.54
  5. Step 5: Solve for x
    x = 178,909,290.54/15,459.62
  6. Step 6: Final answer
    x = 11,572.69

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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.