Home / 20,960.28-31,449.30-9,866.72

Finding the Fourth Proportional to 20,960.28, 31,449.30 and 9,866.72

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Solution

The fourth proportional to 20,960.28, 31,449.30 and 9,866.72 is: 14,804.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,960.28 : 31,449.30 = 9,866.72 : x
  2. Step 2: Convert to fraction form
    20,960.28/31,449.30 = 9,866.72/x
  3. Step 3: Cross multiply
    20,960.28x = 31,449.30 × 9,866.72
  4. Step 4: Simplify right side
    20,960.28x = 310,301,280.05
  5. Step 5: Solve for x
    x = 310,301,280.05/20,960.28
  6. Step 6: Final answer
    x = 14,804.25

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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.