Home / 31,918.70-47,899.91-11,142.20

Finding the Fourth Proportional to 31,918.70, 47,899.91 and 11,142.20

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Solution

The fourth proportional to 31,918.70, 47,899.91 and 11,142.20 is: 16,720.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,918.70 : 47,899.91 = 11,142.20 : x
  2. Step 2: Convert to fraction form
    31,918.70/47,899.91 = 11,142.20/x
  3. Step 3: Cross multiply
    31,918.70x = 47,899.91 × 11,142.20
  4. Step 4: Simplify right side
    31,918.70x = 533,710,081.99
  5. Step 5: Solve for x
    x = 533,710,081.99/31,918.70
  6. Step 6: Final answer
    x = 16,720.92

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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.