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Finding the Fourth Proportional to 15,581.46, 21,502.44 and 9,992.46

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Solution

The fourth proportional to 15,581.46, 21,502.44 and 9,992.46 is: 13,789.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,581.46 : 21,502.44 = 9,992.46 : x
  2. Step 2: Convert to fraction form
    15,581.46/21,502.44 = 9,992.46/x
  3. Step 3: Cross multiply
    15,581.46x = 21,502.44 × 9,992.46
  4. Step 4: Simplify right side
    15,581.46x = 214,862,271.60
  5. Step 5: Solve for x
    x = 214,862,271.60/15,581.46
  6. Step 6: Final answer
    x = 13,789.61

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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.