Home / 15,501.38-21,391.80-8,427.75

Finding the Fourth Proportional to 15,501.38, 21,391.80 and 8,427.75

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Solution

The fourth proportional to 15,501.38, 21,391.80 and 8,427.75 is: 11,630.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,501.38 : 21,391.80 = 8,427.75 : x
  2. Step 2: Convert to fraction form
    15,501.38/21,391.80 = 8,427.75/x
  3. Step 3: Cross multiply
    15,501.38x = 21,391.80 × 8,427.75
  4. Step 4: Simplify right side
    15,501.38x = 180,284,630.63
  5. Step 5: Solve for x
    x = 180,284,630.63/15,501.38
  6. Step 6: Final answer
    x = 11,630.23

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Half scale
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Double scale
Find fourth proportional to 15,502.38, 21,393.18 and 8,428.75
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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.