Home / 20,439.60-30,643.82-10,572.58

Finding the Fourth Proportional to 20,439.60, 30,643.82 and 10,572.58

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Solution

The fourth proportional to 20,439.60, 30,643.82 and 10,572.58 is: 15,850.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,439.60 : 30,643.82 = 10,572.58 : x
  2. Step 2: Convert to fraction form
    20,439.60/30,643.82 = 10,572.58/x
  3. Step 3: Cross multiply
    20,439.60x = 30,643.82 × 10,572.58
  4. Step 4: Simplify right side
    20,439.60x = 323,984,238.46
  5. Step 5: Solve for x
    x = 323,984,238.46/20,439.60
  6. Step 6: Final answer
    x = 15,850.81

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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.