Home / 31,386.33-47,079.39-19,707.75

Finding the Fourth Proportional to 31,386.33, 47,079.39 and 19,707.75

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Solution

The fourth proportional to 31,386.33, 47,079.39 and 19,707.75 is: 29,561.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,386.33 : 47,079.39 = 19,707.75 : x
  2. Step 2: Convert to fraction form
    31,386.33/47,079.39 = 19,707.75/x
  3. Step 3: Cross multiply
    31,386.33x = 47,079.39 × 19,707.75
  4. Step 4: Simplify right side
    31,386.33x = 927,828,848.27
  5. Step 5: Solve for x
    x = 927,828,848.27/31,386.33
  6. Step 6: Final answer
    x = 29,561.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.