Home / 18,731.86-28,089.48-9,964.78

Finding the Fourth Proportional to 18,731.86, 28,089.48 and 9,964.78

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Solution

The fourth proportional to 18,731.86, 28,089.48 and 9,964.78 is: 14,942.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,731.86 : 28,089.48 = 9,964.78 : x
  2. Step 2: Convert to fraction form
    18,731.86/28,089.48 = 9,964.78/x
  3. Step 3: Cross multiply
    18,731.86x = 28,089.48 × 9,964.78
  4. Step 4: Simplify right side
    18,731.86x = 279,905,488.51
  5. Step 5: Solve for x
    x = 279,905,488.51/18,731.86
  6. Step 6: Final answer
    x = 14,942.75

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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.