Home / 31,838.63-43,919.01-19,881.21

Finding the Fourth Proportional to 31,838.63, 43,919.01 and 19,881.21

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Solution

The fourth proportional to 31,838.63, 43,919.01 and 19,881.21 is: 27,424.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,838.63 : 43,919.01 = 19,881.21 : x
  2. Step 2: Convert to fraction form
    31,838.63/43,919.01 = 19,881.21/x
  3. Step 3: Cross multiply
    31,838.63x = 43,919.01 × 19,881.21
  4. Step 4: Simplify right side
    31,838.63x = 873,163,060.80
  5. Step 5: Solve for x
    x = 873,163,060.80/31,838.63
  6. Step 6: Final answer
    x = 27,424.64

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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.