Home / 15,353.07-21,187.19-8,638.71

Finding the Fourth Proportional to 15,353.07, 21,187.19 and 8,638.71

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Solution

The fourth proportional to 15,353.07, 21,187.19 and 8,638.71 is: 11,921.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,353.07 : 21,187.19 = 8,638.71 : x
  2. Step 2: Convert to fraction form
    15,353.07/21,187.19 = 8,638.71/x
  3. Step 3: Cross multiply
    15,353.07x = 21,187.19 × 8,638.71
  4. Step 4: Simplify right side
    15,353.07x = 183,029,932.27
  5. Step 5: Solve for x
    x = 183,029,932.27/15,353.07
  6. Step 6: Final answer
    x = 11,921.39

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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.