Home / 10,320.80-15,480.78-4,772.32

Finding the Fourth Proportional to 10,320.80, 15,480.78 and 4,772.32

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Solution

The fourth proportional to 10,320.80, 15,480.78 and 4,772.32 is: 7,158.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,320.80 : 15,480.78 = 4,772.32 : x
  2. Step 2: Convert to fraction form
    10,320.80/15,480.78 = 4,772.32/x
  3. Step 3: Cross multiply
    10,320.80x = 15,480.78 × 4,772.32
  4. Step 4: Simplify right side
    10,320.80x = 73,879,236.01
  5. Step 5: Solve for x
    x = 73,879,236.01/10,320.80
  6. Step 6: Final answer
    x = 7,158.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.