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Finding the Fourth Proportional to 14,978.68, 20,662.75 and 12,149.35

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Solution

The fourth proportional to 14,978.68, 20,662.75 and 12,149.35 is: 16,759.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,978.68 : 20,662.75 = 12,149.35 : x
  2. Step 2: Convert to fraction form
    14,978.68/20,662.75 = 12,149.35/x
  3. Step 3: Cross multiply
    14,978.68x = 20,662.75 × 12,149.35
  4. Step 4: Simplify right side
    14,978.68x = 251,038,981.71
  5. Step 5: Solve for x
    x = 251,038,981.71/14,978.68
  6. Step 6: Final answer
    x = 16,759.75

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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.