Home / 15,321.48-21,144.81-8,607.39

Finding the Fourth Proportional to 15,321.48, 21,144.81 and 8,607.39

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Solution

The fourth proportional to 15,321.48, 21,144.81 and 8,607.39 is: 11,878.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,321.48 : 21,144.81 = 8,607.39 : x
  2. Step 2: Convert to fraction form
    15,321.48/21,144.81 = 8,607.39/x
  3. Step 3: Cross multiply
    15,321.48x = 21,144.81 × 8,607.39
  4. Step 4: Simplify right side
    15,321.48x = 182,001,626.15
  5. Step 5: Solve for x
    x = 182,001,626.15/15,321.48
  6. Step 6: Final answer
    x = 11,878.85

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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.