Home / 19,670.70-27,180.10-15,724.38

Finding the Fourth Proportional to 19,670.70, 27,180.10 and 15,724.38

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Solution

The fourth proportional to 19,670.70, 27,180.10 and 15,724.38 is: 21,727.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,670.70 : 27,180.10 = 15,724.38 : x
  2. Step 2: Convert to fraction form
    19,670.70/27,180.10 = 15,724.38/x
  3. Step 3: Cross multiply
    19,670.70x = 27,180.10 × 15,724.38
  4. Step 4: Simplify right side
    19,670.70x = 427,390,220.84
  5. Step 5: Solve for x
    x = 427,390,220.84/19,670.70
  6. Step 6: Final answer
    x = 21,727.25

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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.