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Finding the Fourth Proportional to 9,865.70, 13,614.48 and 5,389.49

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Solution

The fourth proportional to 9,865.70, 13,614.48 and 5,389.49 is: 7,437.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,865.70 : 13,614.48 = 5,389.49 : x
  2. Step 2: Convert to fraction form
    9,865.70/13,614.48 = 5,389.49/x
  3. Step 3: Cross multiply
    9,865.70x = 13,614.48 × 5,389.49
  4. Step 4: Simplify right side
    9,865.70x = 73,375,035.74
  5. Step 5: Solve for x
    x = 73,375,035.74/9,865.70
  6. Step 6: Final answer
    x = 7,437.39

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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.