Home / 12,933.28-19,436.40-8,855.20

Finding the Fourth Proportional to 12,933.28, 19,436.40 and 8,855.20

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Solution

The fourth proportional to 12,933.28, 19,436.40 and 8,855.20 is: 13,307.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,933.28 : 19,436.40 = 8,855.20 : x
  2. Step 2: Convert to fraction form
    12,933.28/19,436.40 = 8,855.20/x
  3. Step 3: Cross multiply
    12,933.28x = 19,436.40 × 8,855.20
  4. Step 4: Simplify right side
    12,933.28x = 172,113,209.28
  5. Step 5: Solve for x
    x = 172,113,209.28/12,933.28
  6. Step 6: Final answer
    x = 13,307.78

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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.