Home / 15,330.78-21,158.36-8,616.69

Finding the Fourth Proportional to 15,330.78, 21,158.36 and 8,616.69

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Solution

The fourth proportional to 15,330.78, 21,158.36 and 8,616.69 is: 11,892.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,330.78 : 21,158.36 = 8,616.69 : x
  2. Step 2: Convert to fraction form
    15,330.78/21,158.36 = 8,616.69/x
  3. Step 3: Cross multiply
    15,330.78x = 21,158.36 × 8,616.69
  4. Step 4: Simplify right side
    15,330.78x = 182,315,029.03
  5. Step 5: Solve for x
    x = 182,315,029.03/15,330.78
  6. Step 6: Final answer
    x = 11,892.09

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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.