Home / 12,935.40-19,364.70-8,557.80

Finding the Fourth Proportional to 12,935.40, 19,364.70 and 8,557.80

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Solution

The fourth proportional to 12,935.40, 19,364.70 and 8,557.80 is: 12,811.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,935.40 : 19,364.70 = 8,557.80 : x
  2. Step 2: Convert to fraction form
    12,935.40/19,364.70 = 8,557.80/x
  3. Step 3: Cross multiply
    12,935.40x = 19,364.70 × 8,557.80
  4. Step 4: Simplify right side
    12,935.40x = 165,719,229.66
  5. Step 5: Solve for x
    x = 165,719,229.66/12,935.40
  6. Step 6: Final answer
    x = 12,811.30

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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.