Home / 31,910.28-47,864.88-13,200.36

Finding the Fourth Proportional to 31,910.28, 47,864.88 and 13,200.36

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Solution

The fourth proportional to 31,910.28, 47,864.88 and 13,200.36 is: 19,800.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,910.28 : 47,864.88 = 13,200.36 : x
  2. Step 2: Convert to fraction form
    31,910.28/47,864.88 = 13,200.36/x
  3. Step 3: Cross multiply
    31,910.28x = 47,864.88 × 13,200.36
  4. Step 4: Simplify right side
    31,910.28x = 631,833,647.36
  5. Step 5: Solve for x
    x = 631,833,647.36/31,910.28
  6. Step 6: Final answer
    x = 19,800.32

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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.