Home / 15,439.72-21,309.54-9,155.56

Finding the Fourth Proportional to 15,439.72, 21,309.54 and 9,155.56

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Solution

The fourth proportional to 15,439.72, 21,309.54 and 9,155.56 is: 12,636.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,439.72 : 21,309.54 = 9,155.56 : x
  2. Step 2: Convert to fraction form
    15,439.72/21,309.54 = 9,155.56/x
  3. Step 3: Cross multiply
    15,439.72x = 21,309.54 × 9,155.56
  4. Step 4: Simplify right side
    15,439.72x = 195,100,772.04
  5. Step 5: Solve for x
    x = 195,100,772.04/15,439.72
  6. Step 6: Final answer
    x = 12,636.29

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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.