Home / 15,530.22-21,431.61-8,456.58

Finding the Fourth Proportional to 15,530.22, 21,431.61 and 8,456.58

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Solution

The fourth proportional to 15,530.22, 21,431.61 and 8,456.58 is: 11,670.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,530.22 : 21,431.61 = 8,456.58 : x
  2. Step 2: Convert to fraction form
    15,530.22/21,431.61 = 8,456.58/x
  3. Step 3: Cross multiply
    15,530.22x = 21,431.61 × 8,456.58
  4. Step 4: Simplify right side
    15,530.22x = 181,238,124.49
  5. Step 5: Solve for x
    x = 181,238,124.49/15,530.22
  6. Step 6: Final answer
    x = 11,670.03

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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.