Home / 30,905.52-42,633.18-18,809.70

Finding the Fourth Proportional to 30,905.52, 42,633.18 and 18,809.70

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Solution

The fourth proportional to 30,905.52, 42,633.18 and 18,809.70 is: 25,947.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,905.52 : 42,633.18 = 18,809.70 : x
  2. Step 2: Convert to fraction form
    30,905.52/42,633.18 = 18,809.70/x
  3. Step 3: Cross multiply
    30,905.52x = 42,633.18 × 18,809.70
  4. Step 4: Simplify right side
    30,905.52x = 801,917,325.85
  5. Step 5: Solve for x
    x = 801,917,325.85/30,905.52
  6. Step 6: Final answer
    x = 25,947.38

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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.