Home / 20,897.06-31,344.77-5,315.09

Finding the Fourth Proportional to 20,897.06, 31,344.77 and 5,315.09

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Solution

The fourth proportional to 20,897.06, 31,344.77 and 5,315.09 is: 7,972.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,897.06 : 31,344.77 = 5,315.09 : x
  2. Step 2: Convert to fraction form
    20,897.06/31,344.77 = 5,315.09/x
  3. Step 3: Cross multiply
    20,897.06x = 31,344.77 × 5,315.09
  4. Step 4: Simplify right side
    20,897.06x = 166,600,130.14
  5. Step 5: Solve for x
    x = 166,600,130.14/20,897.06
  6. Step 6: Final answer
    x = 7,972.42

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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.