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Finding the Fourth Proportional to 7,420.79, 10,239 and 4,436.12

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Solution

The fourth proportional to 7,420.79, 10,239 and 4,436.12 is: 6,120.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,420.79 : 10,239 = 4,436.12 : x
  2. Step 2: Convert to fraction form
    7,420.79/10,239 = 4,436.12/x
  3. Step 3: Cross multiply
    7,420.79x = 10,239 × 4,436.12
  4. Step 4: Simplify right side
    7,420.79x = 45,421,432.68
  5. Step 5: Solve for x
    x = 45,421,432.68/7,420.79
  6. Step 6: Final answer
    x = 6,120.84

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Half scale
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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.