Home / 15,530.14-21,431.62-8,456.59

Finding the Fourth Proportional to 15,530.14, 21,431.62 and 8,456.59

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Solution

The fourth proportional to 15,530.14, 21,431.62 and 8,456.59 is: 11,670.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,530.14 : 21,431.62 = 8,456.59 : x
  2. Step 2: Convert to fraction form
    15,530.14/21,431.62 = 8,456.59/x
  3. Step 3: Cross multiply
    15,530.14x = 21,431.62 × 8,456.59
  4. Step 4: Simplify right side
    15,530.14x = 181,238,423.38
  5. Step 5: Solve for x
    x = 181,238,423.38/15,530.14
  6. Step 6: Final answer
    x = 11,670.11

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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.