Home / 20,429.70-30,643.94-5,639.52

Finding the Fourth Proportional to 20,429.70, 30,643.94 and 5,639.52

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Solution

The fourth proportional to 20,429.70, 30,643.94 and 5,639.52 is: 8,459.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,429.70 : 30,643.94 = 5,639.52 : x
  2. Step 2: Convert to fraction form
    20,429.70/30,643.94 = 5,639.52/x
  3. Step 3: Cross multiply
    20,429.70x = 30,643.94 × 5,639.52
  4. Step 4: Simplify right side
    20,429.70x = 172,817,112.51
  5. Step 5: Solve for x
    x = 172,817,112.51/20,429.70
  6. Step 6: Final answer
    x = 8,459.11

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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.