Home / 31,678.39-43,705.06-19,731.84

Finding the Fourth Proportional to 31,678.39, 43,705.06 and 19,731.84

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Solution

The fourth proportional to 31,678.39, 43,705.06 and 19,731.84 is: 27,223.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,678.39 : 43,705.06 = 19,731.84 : x
  2. Step 2: Convert to fraction form
    31,678.39/43,705.06 = 19,731.84/x
  3. Step 3: Cross multiply
    31,678.39x = 43,705.06 × 19,731.84
  4. Step 4: Simplify right side
    31,678.39x = 862,381,251.11
  5. Step 5: Solve for x
    x = 862,381,251.11/31,678.39
  6. Step 6: Final answer
    x = 27,223.01

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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.