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Finding the Fourth Proportional to 7,237.49, 9,990.20 and 4,254.21

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Solution

The fourth proportional to 7,237.49, 9,990.20 and 4,254.21 is: 5,872.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,237.49 : 9,990.20 = 4,254.21 : x
  2. Step 2: Convert to fraction form
    7,237.49/9,990.20 = 4,254.21/x
  3. Step 3: Cross multiply
    7,237.49x = 9,990.20 × 4,254.21
  4. Step 4: Simplify right side
    7,237.49x = 42,500,408.74
  5. Step 5: Solve for x
    x = 42,500,408.74/7,237.49
  6. Step 6: Final answer
    x = 5,872.26

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Double scale
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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.