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Finding the Fourth Proportional to 18,756.86, 28,085.15 and 9,973.01

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Solution

The fourth proportional to 18,756.86, 28,085.15 and 9,973.01 is: 14,932.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,756.86 : 28,085.15 = 9,973.01 : x
  2. Step 2: Convert to fraction form
    18,756.86/28,085.15 = 9,973.01/x
  3. Step 3: Cross multiply
    18,756.86x = 28,085.15 × 9,973.01
  4. Step 4: Simplify right side
    18,756.86x = 280,093,291.51
  5. Step 5: Solve for x
    x = 280,093,291.51/18,756.86
  6. Step 6: Final answer
    x = 14,932.85

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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.