Home / 30,905.32-42,633.64-19,555.68

Finding the Fourth Proportional to 30,905.32, 42,633.64 and 19,555.68

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Solution

The fourth proportional to 30,905.32, 42,633.64 and 19,555.68 is: 26,976.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,905.32 : 42,633.64 = 19,555.68 : x
  2. Step 2: Convert to fraction form
    30,905.32/42,633.64 = 19,555.68/x
  3. Step 3: Cross multiply
    30,905.32x = 42,633.64 × 19,555.68
  4. Step 4: Simplify right side
    30,905.32x = 833,729,821.08
  5. Step 5: Solve for x
    x = 833,729,821.08/30,905.32
  6. Step 6: Final answer
    x = 26,976.90

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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.