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Finding the Fourth Proportional to 21,485.70, 32,225.72 and 8,331.30

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Solution

The fourth proportional to 21,485.70, 32,225.72 and 8,331.30 is: 12,495.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,485.70 : 32,225.72 = 8,331.30 : x
  2. Step 2: Convert to fraction form
    21,485.70/32,225.72 = 8,331.30/x
  3. Step 3: Cross multiply
    21,485.70x = 32,225.72 × 8,331.30
  4. Step 4: Simplify right side
    21,485.70x = 268,482,099.38
  5. Step 5: Solve for x
    x = 268,482,099.38/21,485.70
  6. Step 6: Final answer
    x = 12,495.85

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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.