Home / 30,975.55-42,753.06-20,366.17

Finding the Fourth Proportional to 30,975.55, 42,753.06 and 20,366.17

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Solution

The fourth proportional to 30,975.55, 42,753.06 and 20,366.17 is: 28,109.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,975.55 : 42,753.06 = 20,366.17 : x
  2. Step 2: Convert to fraction form
    30,975.55/42,753.06 = 20,366.17/x
  3. Step 3: Cross multiply
    30,975.55x = 42,753.06 × 20,366.17
  4. Step 4: Simplify right side
    30,975.55x = 870,716,087.98
  5. Step 5: Solve for x
    x = 870,716,087.98/30,975.55
  6. Step 6: Final answer
    x = 28,109.79

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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.