Home / 20,953.32-31,449.72-7,639.19

Finding the Fourth Proportional to 20,953.32, 31,449.72 and 7,639.19

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Solution

The fourth proportional to 20,953.32, 31,449.72 and 7,639.19 is: 11,465.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,953.32 : 31,449.72 = 7,639.19 : x
  2. Step 2: Convert to fraction form
    20,953.32/31,449.72 = 7,639.19/x
  3. Step 3: Cross multiply
    20,953.32x = 31,449.72 × 7,639.19
  4. Step 4: Simplify right side
    20,953.32x = 240,250,229.28
  5. Step 5: Solve for x
    x = 240,250,229.28/20,953.32
  6. Step 6: Final answer
    x = 11,465.98

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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.