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Finding the Fourth Proportional to 7,394.70, 11,070.45 and 7,178.70

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Solution

The fourth proportional to 7,394.70, 11,070.45 and 7,178.70 is: 10,747.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,394.70 : 11,070.45 = 7,178.70 : x
  2. Step 2: Convert to fraction form
    7,394.70/11,070.45 = 7,178.70/x
  3. Step 3: Cross multiply
    7,394.70x = 11,070.45 × 7,178.70
  4. Step 4: Simplify right side
    7,394.70x = 79,471,439.42
  5. Step 5: Solve for x
    x = 79,471,439.42/7,394.70
  6. Step 6: Final answer
    x = 10,747.08

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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.