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Finding the Fourth Proportional to 9,890.57, 14,735.97 and 9,420.37

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Solution

The fourth proportional to 9,890.57, 14,735.97 and 9,420.37 is: 14,035.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,890.57 : 14,735.97 = 9,420.37 : x
  2. Step 2: Convert to fraction form
    9,890.57/14,735.97 = 9,420.37/x
  3. Step 3: Cross multiply
    9,890.57x = 14,735.97 × 9,420.37
  4. Step 4: Simplify right side
    9,890.57x = 138,818,252.87
  5. Step 5: Solve for x
    x = 138,818,252.87/9,890.57
  6. Step 6: Final answer
    x = 14,035.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.