Home / 15,219.45-21,002.87-8,505.08

Finding the Fourth Proportional to 15,219.45, 21,002.87 and 8,505.08

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Solution

The fourth proportional to 15,219.45, 21,002.87 and 8,505.08 is: 11,737.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,219.45 : 21,002.87 = 8,505.08 : x
  2. Step 2: Convert to fraction form
    15,219.45/21,002.87 = 8,505.08/x
  3. Step 3: Cross multiply
    15,219.45x = 21,002.87 × 8,505.08
  4. Step 4: Simplify right side
    15,219.45x = 178,631,107.29
  5. Step 5: Solve for x
    x = 178,631,107.29/15,219.45
  6. Step 6: Final answer
    x = 11,737.03

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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.