Home / 15,387.21-21,236.19-8,674.11

Finding the Fourth Proportional to 15,387.21, 21,236.19 and 8,674.11

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Solution

The fourth proportional to 15,387.21, 21,236.19 and 8,674.11 is: 11,971.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,387.21 : 21,236.19 = 8,674.11 : x
  2. Step 2: Convert to fraction form
    15,387.21/21,236.19 = 8,674.11/x
  3. Step 3: Cross multiply
    15,387.21x = 21,236.19 × 8,674.11
  4. Step 4: Simplify right side
    15,387.21x = 184,205,048.04
  5. Step 5: Solve for x
    x = 184,205,048.04/15,387.21
  6. Step 6: Final answer
    x = 11,971.31

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Half scale
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Double scale
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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.