Home / 20,909.18-28,850.36-12,410.12

Finding the Fourth Proportional to 20,909.18, 28,850.36 and 12,410.12

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Solution

The fourth proportional to 20,909.18, 28,850.36 and 12,410.12 is: 17,123.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,909.18 : 28,850.36 = 12,410.12 : x
  2. Step 2: Convert to fraction form
    20,909.18/28,850.36 = 12,410.12/x
  3. Step 3: Cross multiply
    20,909.18x = 28,850.36 × 12,410.12
  4. Step 4: Simplify right side
    20,909.18x = 358,036,429.64
  5. Step 5: Solve for x
    x = 358,036,429.64/20,909.18
  6. Step 6: Final answer
    x = 17,123.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.