Home / 15,456.66-21,330.34-8,383.23

Finding the Fourth Proportional to 15,456.66, 21,330.34 and 8,383.23

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Solution

The fourth proportional to 15,456.66, 21,330.34 and 8,383.23 is: 11,568.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,456.66 : 21,330.34 = 8,383.23 : x
  2. Step 2: Convert to fraction form
    15,456.66/21,330.34 = 8,383.23/x
  3. Step 3: Cross multiply
    15,456.66x = 21,330.34 × 8,383.23
  4. Step 4: Simplify right side
    15,456.66x = 178,817,125.24
  5. Step 5: Solve for x
    x = 178,817,125.24/15,456.66
  6. Step 6: Final answer
    x = 11,568.94

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Double scale
Find fourth proportional to 15,457.66, 21,331.72 and 8,384.23
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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.