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Finding the Fourth Proportional to 9,578.40, 14,357.70 and 6,939.42

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Solution

The fourth proportional to 9,578.40, 14,357.70 and 6,939.42 is: 10,401.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,578.40 : 14,357.70 = 6,939.42 : x
  2. Step 2: Convert to fraction form
    9,578.40/14,357.70 = 6,939.42/x
  3. Step 3: Cross multiply
    9,578.40x = 14,357.70 × 6,939.42
  4. Step 4: Simplify right side
    9,578.40x = 99,634,110.53
  5. Step 5: Solve for x
    x = 99,634,110.53/9,578.40
  6. Step 6: Final answer
    x = 10,401.96

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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.