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Finding the Fourth Proportional to 18,870.76, 26,040.54 and 10,912.42

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Solution

The fourth proportional to 18,870.76, 26,040.54 and 10,912.42 is: 15,058.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,870.76 : 26,040.54 = 10,912.42 : x
  2. Step 2: Convert to fraction form
    18,870.76/26,040.54 = 10,912.42/x
  3. Step 3: Cross multiply
    18,870.76x = 26,040.54 × 10,912.42
  4. Step 4: Simplify right side
    18,870.76x = 284,165,309.51
  5. Step 5: Solve for x
    x = 284,165,309.51/18,870.76
  6. Step 6: Final answer
    x = 15,058.50

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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.