Home / 20,930.10-31,395.15-7,079.10

Finding the Fourth Proportional to 20,930.10, 31,395.15 and 7,079.10

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Solution

The fourth proportional to 20,930.10, 31,395.15 and 7,079.10 is: 10,618.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,930.10 : 31,395.15 = 7,079.10 : x
  2. Step 2: Convert to fraction form
    20,930.10/31,395.15 = 7,079.10/x
  3. Step 3: Cross multiply
    20,930.10x = 31,395.15 × 7,079.10
  4. Step 4: Simplify right side
    20,930.10x = 222,249,406.37
  5. Step 5: Solve for x
    x = 222,249,406.37/20,930.10
  6. Step 6: Final answer
    x = 10,618.65

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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.