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Finding the Fourth Proportional to 21,885.66, 32,825.39 and 12,495.20

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Solution

The fourth proportional to 21,885.66, 32,825.39 and 12,495.20 is: 18,741.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,885.66 : 32,825.39 = 12,495.20 : x
  2. Step 2: Convert to fraction form
    21,885.66/32,825.39 = 12,495.20/x
  3. Step 3: Cross multiply
    21,885.66x = 32,825.39 × 12,495.20
  4. Step 4: Simplify right side
    21,885.66x = 410,159,586.53
  5. Step 5: Solve for x
    x = 410,159,586.53/21,885.66
  6. Step 6: Final answer
    x = 18,741.02

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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.