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Finding the Fourth Proportional to 21,490.08, 32,220 and 8,331.36

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Solution

The fourth proportional to 21,490.08, 32,220 and 8,331.36 is: 12,491.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,490.08 : 32,220 = 8,331.36 : x
  2. Step 2: Convert to fraction form
    21,490.08/32,220 = 8,331.36/x
  3. Step 3: Cross multiply
    21,490.08x = 32,220 × 8,331.36
  4. Step 4: Simplify right side
    21,490.08x = 268,436,419.20
  5. Step 5: Solve for x
    x = 268,436,419.20/21,490.08
  6. Step 6: Final answer
    x = 12,491.18

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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.