Home / 7,478.10-10,319.64-4,121.22

Finding the Fourth Proportional to 7,478.10, 10,319.64 and 4,121.22

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Solution

The fourth proportional to 7,478.10, 10,319.64 and 4,121.22 is: 5,687.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,478.10 : 10,319.64 = 4,121.22 : x
  2. Step 2: Convert to fraction form
    7,478.10/10,319.64 = 4,121.22/x
  3. Step 3: Cross multiply
    7,478.10x = 10,319.64 × 4,121.22
  4. Step 4: Simplify right side
    7,478.10x = 42,529,530.00
  5. Step 5: Solve for x
    x = 42,529,530.00/7,478.10
  6. Step 6: Final answer
    x = 5,687.21

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Half 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.