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Finding the Fourth Proportional to 37,991.79, 56,987.72 and 9,911.81

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Solution

The fourth proportional to 37,991.79, 56,987.72 and 9,911.81 is: 14,867.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    37,991.79 : 56,987.72 = 9,911.81 : x
  2. Step 2: Convert to fraction form
    37,991.79/56,987.72 = 9,911.81/x
  3. Step 3: Cross multiply
    37,991.79x = 56,987.72 × 9,911.81
  4. Step 4: Simplify right side
    37,991.79x = 564,851,118.48
  5. Step 5: Solve for x
    x = 564,851,118.48/37,991.79
  6. Step 6: Final answer
    x = 14,867.72

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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.