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Finding the Fourth Proportional to 18,015.40, 26,950.20 and 15,828.40

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Solution

The fourth proportional to 18,015.40, 26,950.20 and 15,828.40 is: 23,678.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,015.40 : 26,950.20 = 15,828.40 : x
  2. Step 2: Convert to fraction form
    18,015.40/26,950.20 = 15,828.40/x
  3. Step 3: Cross multiply
    18,015.40x = 26,950.20 × 15,828.40
  4. Step 4: Simplify right side
    18,015.40x = 426,578,545.68
  5. Step 5: Solve for x
    x = 426,578,545.68/18,015.40
  6. Step 6: Final answer
    x = 23,678.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.