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Finding the Fourth Proportional to 12,788.95, 19,186.04 and 5,393.42

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Solution

The fourth proportional to 12,788.95, 19,186.04 and 5,393.42 is: 8,091.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,788.95 : 19,186.04 = 5,393.42 : x
  2. Step 2: Convert to fraction form
    12,788.95/19,186.04 = 5,393.42/x
  3. Step 3: Cross multiply
    12,788.95x = 19,186.04 × 5,393.42
  4. Step 4: Simplify right side
    12,788.95x = 103,478,275.93
  5. Step 5: Solve for x
    x = 103,478,275.93/12,788.95
  6. Step 6: Final answer
    x = 8,091.23

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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.