Home / 31,015.71-42,816.20-19,844.19

Finding the Fourth Proportional to 31,015.71, 42,816.20 and 19,844.19

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Solution

The fourth proportional to 31,015.71, 42,816.20 and 19,844.19 is: 27,394.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,015.71 : 42,816.20 = 19,844.19 : x
  2. Step 2: Convert to fraction form
    31,015.71/42,816.20 = 19,844.19/x
  3. Step 3: Cross multiply
    31,015.71x = 42,816.20 × 19,844.19
  4. Step 4: Simplify right side
    31,015.71x = 849,652,708.66
  5. Step 5: Solve for x
    x = 849,652,708.66/31,015.71
  6. Step 6: Final answer
    x = 27,394.27

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Double scale
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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.