Home / 7,420.32-10,240.20-4,435.58

Finding the Fourth Proportional to 7,420.32, 10,240.20 and 4,435.58

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Solution

The fourth proportional to 7,420.32, 10,240.20 and 4,435.58 is: 6,121.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,420.32 : 10,240.20 = 4,435.58 : x
  2. Step 2: Convert to fraction form
    7,420.32/10,240.20 = 4,435.58/x
  3. Step 3: Cross multiply
    7,420.32x = 10,240.20 × 4,435.58
  4. Step 4: Simplify right side
    7,420.32x = 45,421,226.32
  5. Step 5: Solve for x
    x = 45,421,226.32/7,420.32
  6. Step 6: Final answer
    x = 6,121.20

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Double scale
Find fourth proportional to 7,421.32, 10,241.58 and 4,436.58
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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.