Home / 19,857.90-27,403.89-10,905.40

Finding the Fourth Proportional to 19,857.90, 27,403.89 and 10,905.40

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Solution

The fourth proportional to 19,857.90, 27,403.89 and 10,905.40 is: 15,049.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,857.90 : 27,403.89 = 10,905.40 : x
  2. Step 2: Convert to fraction form
    19,857.90/27,403.89 = 10,905.40/x
  3. Step 3: Cross multiply
    19,857.90x = 27,403.89 × 10,905.40
  4. Step 4: Simplify right side
    19,857.90x = 298,850,382.01
  5. Step 5: Solve for x
    x = 298,850,382.01/19,857.90
  6. Step 6: Final answer
    x = 15,049.45

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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.