Home / 31,783.63-43,869.92-19,839.77

Finding the Fourth Proportional to 31,783.63, 43,869.92 and 19,839.77

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Solution

The fourth proportional to 31,783.63, 43,869.92 and 19,839.77 is: 27,384.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,783.63 : 43,869.92 = 19,839.77 : x
  2. Step 2: Convert to fraction form
    31,783.63/43,869.92 = 19,839.77/x
  3. Step 3: Cross multiply
    31,783.63x = 43,869.92 × 19,839.77
  4. Step 4: Simplify right side
    31,783.63x = 870,369,133.19
  5. Step 5: Solve for x
    x = 870,369,133.19/31,783.63
  6. Step 6: Final answer
    x = 27,384.20

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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.