Home / 15,187.72-20,947.73-11,153.28

Finding the Fourth Proportional to 15,187.72, 20,947.73 and 11,153.28

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Solution

The fourth proportional to 15,187.72, 20,947.73 and 11,153.28 is: 15,383.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,187.72 : 20,947.73 = 11,153.28 : x
  2. Step 2: Convert to fraction form
    15,187.72/20,947.73 = 11,153.28/x
  3. Step 3: Cross multiply
    15,187.72x = 20,947.73 × 11,153.28
  4. Step 4: Simplify right side
    15,187.72x = 233,635,898.05
  5. Step 5: Solve for x
    x = 233,635,898.05/15,187.72
  6. Step 6: Final answer
    x = 15,383.21

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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.