Home / 19,670.40-27,142.08-11,285.28

Finding the Fourth Proportional to 19,670.40, 27,142.08 and 11,285.28

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Solution

The fourth proportional to 19,670.40, 27,142.08 and 11,285.28 is: 15,571.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,670.40 : 27,142.08 = 11,285.28 : x
  2. Step 2: Convert to fraction form
    19,670.40/27,142.08 = 11,285.28/x
  3. Step 3: Cross multiply
    19,670.40x = 27,142.08 × 11,285.28
  4. Step 4: Simplify right side
    19,670.40x = 306,305,972.58
  5. Step 5: Solve for x
    x = 306,305,972.58/19,670.40
  6. Step 6: Final answer
    x = 15,571.92

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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.