Home / 3,121.80-4,681.08-1,560.12

Finding the Fourth Proportional to 3,121.80, 4,681.08 and 1,560.12

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Solution

The fourth proportional to 3,121.80, 4,681.08 and 1,560.12 is: 2,339.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.80 : 4,681.08 = 1,560.12 : x
  2. Step 2: Convert to fraction form
    3,121.80/4,681.08 = 1,560.12/x
  3. Step 3: Cross multiply
    3,121.80x = 4,681.08 × 1,560.12
  4. Step 4: Simplify right side
    3,121.80x = 7,303,046.53
  5. Step 5: Solve for x
    x = 7,303,046.53/3,121.80
  6. Step 6: Final answer
    x = 2,339.37

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.