Home / 31,428.80-43,391.88-19,509.68

Finding the Fourth Proportional to 31,428.80, 43,391.88 and 19,509.68

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Solution

The fourth proportional to 31,428.80, 43,391.88 and 19,509.68 is: 26,935.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,428.80 : 43,391.88 = 19,509.68 : x
  2. Step 2: Convert to fraction form
    31,428.80/43,391.88 = 19,509.68/x
  3. Step 3: Cross multiply
    31,428.80x = 43,391.88 × 19,509.68
  4. Step 4: Simplify right side
    31,428.80x = 846,561,693.40
  5. Step 5: Solve for x
    x = 846,561,693.40/31,428.80
  6. Step 6: Final answer
    x = 26,935.86

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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.