Home / 20,307.18-28,022.61-11,355.42

Finding the Fourth Proportional to 20,307.18, 28,022.61 and 11,355.42

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Solution

The fourth proportional to 20,307.18, 28,022.61 and 11,355.42 is: 15,669.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,307.18 : 28,022.61 = 11,355.42 : x
  2. Step 2: Convert to fraction form
    20,307.18/28,022.61 = 11,355.42/x
  3. Step 3: Cross multiply
    20,307.18x = 28,022.61 × 11,355.42
  4. Step 4: Simplify right side
    20,307.18x = 318,208,506.05
  5. Step 5: Solve for x
    x = 318,208,506.05/20,307.18
  6. Step 6: Final answer
    x = 15,669.75

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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.