Home / 13,215.90-19,823.85-9,887.61

Finding the Fourth Proportional to 13,215.90, 19,823.85 and 9,887.61

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Solution

The fourth proportional to 13,215.90, 19,823.85 and 9,887.61 is: 14,831.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,215.90 : 19,823.85 = 9,887.61 : x
  2. Step 2: Convert to fraction form
    13,215.90/19,823.85 = 9,887.61/x
  3. Step 3: Cross multiply
    13,215.90x = 19,823.85 × 9,887.61
  4. Step 4: Simplify right side
    13,215.90x = 196,010,497.50
  5. Step 5: Solve for x
    x = 196,010,497.50/13,215.90
  6. Step 6: Final answer
    x = 14,831.42

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.