Home / 20,971.44-31,418.10-10,429.38

Finding the Fourth Proportional to 20,971.44, 31,418.10 and 10,429.38

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Solution

The fourth proportional to 20,971.44, 31,418.10 and 10,429.38 is: 15,624.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,971.44 : 31,418.10 = 10,429.38 : x
  2. Step 2: Convert to fraction form
    20,971.44/31,418.10 = 10,429.38/x
  3. Step 3: Cross multiply
    20,971.44x = 31,418.10 × 10,429.38
  4. Step 4: Simplify right side
    20,971.44x = 327,671,303.78
  5. Step 5: Solve for x
    x = 327,671,303.78/20,971.44
  6. Step 6: Final answer
    x = 15,624.64

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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.