Home / 12,938.28-19,380.54-8,235.02

Finding the Fourth Proportional to 12,938.28, 19,380.54 and 8,235.02

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Solution

The fourth proportional to 12,938.28, 19,380.54 and 8,235.02 is: 12,335.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,938.28 : 19,380.54 = 8,235.02 : x
  2. Step 2: Convert to fraction form
    12,938.28/19,380.54 = 8,235.02/x
  3. Step 3: Cross multiply
    12,938.28x = 19,380.54 × 8,235.02
  4. Step 4: Simplify right side
    12,938.28x = 159,599,037.61
  5. Step 5: Solve for x
    x = 159,599,037.61/12,938.28
  6. Step 6: Final answer
    x = 12,335.41

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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.