Home / 31,813.79-43,908.47-18,392.78

Finding the Fourth Proportional to 31,813.79, 43,908.47 and 18,392.78

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Solution

The fourth proportional to 31,813.79, 43,908.47 and 18,392.78 is: 25,385.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,813.79 : 43,908.47 = 18,392.78 : x
  2. Step 2: Convert to fraction form
    31,813.79/43,908.47 = 18,392.78/x
  3. Step 3: Cross multiply
    31,813.79x = 43,908.47 × 18,392.78
  4. Step 4: Simplify right side
    31,813.79x = 807,598,951.51
  5. Step 5: Solve for x
    x = 807,598,951.51/31,813.79
  6. Step 6: Final answer
    x = 25,385.19

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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.