Home / 15,291.56-21,102.58-8,917.98

Finding the Fourth Proportional to 15,291.56, 21,102.58 and 8,917.98

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Solution

The fourth proportional to 15,291.56, 21,102.58 and 8,917.98 is: 12,306.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,291.56 : 21,102.58 = 8,917.98 : x
  2. Step 2: Convert to fraction form
    15,291.56/21,102.58 = 8,917.98/x
  3. Step 3: Cross multiply
    15,291.56x = 21,102.58 × 8,917.98
  4. Step 4: Simplify right side
    15,291.56x = 188,192,386.39
  5. Step 5: Solve for x
    x = 188,192,386.39/15,291.56
  6. Step 6: Final answer
    x = 12,306.94

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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.