Home / 20,909.05-31,360.55-6,869.64

Finding the Fourth Proportional to 20,909.05, 31,360.55 and 6,869.64

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Solution

The fourth proportional to 20,909.05, 31,360.55 and 6,869.64 is: 10,303.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,909.05 : 31,360.55 = 6,869.64 : x
  2. Step 2: Convert to fraction form
    20,909.05/31,360.55 = 6,869.64/x
  3. Step 3: Cross multiply
    20,909.05x = 31,360.55 × 6,869.64
  4. Step 4: Simplify right side
    20,909.05x = 215,435,599.78
  5. Step 5: Solve for x
    x = 215,435,599.78/20,909.05
  6. Step 6: Final answer
    x = 10,303.46

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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.