Home / 20,888.20-31,315.86-10,350.98

Finding the Fourth Proportional to 20,888.20, 31,315.86 and 10,350.98

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Solution

The fourth proportional to 20,888.20, 31,315.86 and 10,350.98 is: 15,518.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,888.20 : 31,315.86 = 10,350.98 : x
  2. Step 2: Convert to fraction form
    20,888.20/31,315.86 = 10,350.98/x
  3. Step 3: Cross multiply
    20,888.20x = 31,315.86 × 10,350.98
  4. Step 4: Simplify right side
    20,888.20x = 324,149,632.21
  5. Step 5: Solve for x
    x = 324,149,632.21/20,888.20
  6. Step 6: Final answer
    x = 15,518.32

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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.