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Finding the Fourth Proportional to 18,950.76, 28,389.69 and 10,605.51

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Solution

The fourth proportional to 18,950.76, 28,389.69 and 10,605.51 is: 15,887.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,950.76 : 28,389.69 = 10,605.51 : x
  2. Step 2: Convert to fraction form
    18,950.76/28,389.69 = 10,605.51/x
  3. Step 3: Cross multiply
    18,950.76x = 28,389.69 × 10,605.51
  4. Step 4: Simplify right side
    18,950.76x = 301,087,141.19
  5. Step 5: Solve for x
    x = 301,087,141.19/18,950.76
  6. Step 6: Final answer
    x = 15,887.87

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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.