Home / 20,878.20-31,328.28-9,199.44

Finding the Fourth Proportional to 20,878.20, 31,328.28 and 9,199.44

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Solution

The fourth proportional to 20,878.20, 31,328.28 and 9,199.44 is: 13,804.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,878.20 : 31,328.28 = 9,199.44 : x
  2. Step 2: Convert to fraction form
    20,878.20/31,328.28 = 9,199.44/x
  3. Step 3: Cross multiply
    20,878.20x = 31,328.28 × 9,199.44
  4. Step 4: Simplify right side
    20,878.20x = 288,202,632.16
  5. Step 5: Solve for x
    x = 288,202,632.16/20,878.20
  6. Step 6: Final answer
    x = 13,804.00

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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.