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Finding the Fourth Proportional to 14,991.85, 20,688.91 and 8,277.47

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Solution

The fourth proportional to 14,991.85, 20,688.91 and 8,277.47 is: 11,422.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,991.85 : 20,688.91 = 8,277.47 : x
  2. Step 2: Convert to fraction form
    14,991.85/20,688.91 = 8,277.47/x
  3. Step 3: Cross multiply
    14,991.85x = 20,688.91 × 8,277.47
  4. Step 4: Simplify right side
    14,991.85x = 171,251,715.48
  5. Step 5: Solve for x
    x = 171,251,715.48/14,991.85
  6. Step 6: Final answer
    x = 11,422.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.