Home / 3,129.39-4,320.12-1,802.84

Finding the Fourth Proportional to 3,129.39, 4,320.12 and 1,802.84

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Solution

The fourth proportional to 3,129.39, 4,320.12 and 1,802.84 is: 2,488.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.39 : 4,320.12 = 1,802.84 : x
  2. Step 2: Convert to fraction form
    3,129.39/4,320.12 = 1,802.84/x
  3. Step 3: Cross multiply
    3,129.39x = 4,320.12 × 1,802.84
  4. Step 4: Simplify right side
    3,129.39x = 7,788,485.14
  5. Step 5: Solve for x
    x = 7,788,485.14/3,129.39
  6. Step 6: Final answer
    x = 2,488.82

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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.