Home / 20,748.12-31,122.18-6,897.12

Finding the Fourth Proportional to 20,748.12, 31,122.18 and 6,897.12

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Solution

The fourth proportional to 20,748.12, 31,122.18 and 6,897.12 is: 10,345.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,748.12 : 31,122.18 = 6,897.12 : x
  2. Step 2: Convert to fraction form
    20,748.12/31,122.18 = 6,897.12/x
  3. Step 3: Cross multiply
    20,748.12x = 31,122.18 × 6,897.12
  4. Step 4: Simplify right side
    20,748.12x = 214,653,410.12
  5. Step 5: Solve for x
    x = 214,653,410.12/20,748.12
  6. Step 6: Final answer
    x = 10,345.68

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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.