Home / 21,027.50-31,541.25-8,554.31

Finding the Fourth Proportional to 21,027.50, 31,541.25 and 8,554.31

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Solution

The fourth proportional to 21,027.50, 31,541.25 and 8,554.31 is: 12,831.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,027.50 : 31,541.25 = 8,554.31 : x
  2. Step 2: Convert to fraction form
    21,027.50/31,541.25 = 8,554.31/x
  3. Step 3: Cross multiply
    21,027.50x = 31,541.25 × 8,554.31
  4. Step 4: Simplify right side
    21,027.50x = 269,813,630.29
  5. Step 5: Solve for x
    x = 269,813,630.29/21,027.50
  6. Step 6: Final answer
    x = 12,831.47

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.