Home / 15,330.89-21,156.81-8,616.12

Finding the Fourth Proportional to 15,330.89, 21,156.81 and 8,616.12

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Solution

The fourth proportional to 15,330.89, 21,156.81 and 8,616.12 is: 11,890.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,330.89 : 21,156.81 = 8,616.12 : x
  2. Step 2: Convert to fraction form
    15,330.89/21,156.81 = 8,616.12/x
  3. Step 3: Cross multiply
    15,330.89x = 21,156.81 × 8,616.12
  4. Step 4: Simplify right side
    15,330.89x = 182,289,613.78
  5. Step 5: Solve for x
    x = 182,289,613.78/15,330.89
  6. Step 6: Final answer
    x = 11,890.35

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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.