Home / 21,427.40-32,145.90-8,278.60

Finding the Fourth Proportional to 21,427.40, 32,145.90 and 8,278.60

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Solution

The fourth proportional to 21,427.40, 32,145.90 and 8,278.60 is: 12,419.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,427.40 : 32,145.90 = 8,278.60 : x
  2. Step 2: Convert to fraction form
    21,427.40/32,145.90 = 8,278.60/x
  3. Step 3: Cross multiply
    21,427.40x = 32,145.90 × 8,278.60
  4. Step 4: Simplify right side
    21,427.40x = 266,123,047.74
  5. Step 5: Solve for x
    x = 266,123,047.74/21,427.40
  6. Step 6: Final answer
    x = 12,419.75

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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.