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Finding the Fourth Proportional to 7,139.14, 9,865.56 and 5,367.67

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Solution

The fourth proportional to 7,139.14, 9,865.56 and 5,367.67 is: 7,417.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,139.14 : 9,865.56 = 5,367.67 : x
  2. Step 2: Convert to fraction form
    7,139.14/9,865.56 = 5,367.67/x
  3. Step 3: Cross multiply
    7,139.14x = 9,865.56 × 5,367.67
  4. Step 4: Simplify right side
    7,139.14x = 52,955,065.91
  5. Step 5: Solve for x
    x = 52,955,065.91/7,139.14
  6. Step 6: Final answer
    x = 7,417.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.