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Finding the Fourth Proportional to 15,155.07, 20,913.99 and 9,858.89

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Solution

The fourth proportional to 15,155.07, 20,913.99 and 9,858.89 is: 13,605.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,155.07 : 20,913.99 = 9,858.89 : x
  2. Step 2: Convert to fraction form
    15,155.07/20,913.99 = 9,858.89/x
  3. Step 3: Cross multiply
    15,155.07x = 20,913.99 × 9,858.89
  4. Step 4: Simplify right side
    15,155.07x = 206,188,622.30
  5. Step 5: Solve for x
    x = 206,188,622.30/15,155.07
  6. Step 6: Final answer
    x = 13,605.26

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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.