Home / 20,740.69-31,110.89-5,158.32

Finding the Fourth Proportional to 20,740.69, 31,110.89 and 5,158.32

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Solution

The fourth proportional to 20,740.69, 31,110.89 and 5,158.32 is: 7,737.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,740.69 : 31,110.89 = 5,158.32 : x
  2. Step 2: Convert to fraction form
    20,740.69/31,110.89 = 5,158.32/x
  3. Step 3: Cross multiply
    20,740.69x = 31,110.89 × 5,158.32
  4. Step 4: Simplify right side
    20,740.69x = 160,479,783.65
  5. Step 5: Solve for x
    x = 160,479,783.65/20,740.69
  6. Step 6: Final answer
    x = 7,737.44

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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.