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Finding the Fourth Proportional to 14,991.33, 20,689.79 and 12,468.99

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Solution

The fourth proportional to 14,991.33, 20,689.79 and 12,468.99 is: 17,208.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,991.33 : 20,689.79 = 12,468.99 : x
  2. Step 2: Convert to fraction form
    14,991.33/20,689.79 = 12,468.99/x
  3. Step 3: Cross multiply
    14,991.33x = 20,689.79 × 12,468.99
  4. Step 4: Simplify right side
    14,991.33x = 257,980,784.61
  5. Step 5: Solve for x
    x = 257,980,784.61/14,991.33
  6. Step 6: Final answer
    x = 17,208.67

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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.