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Finding the Fourth Proportional to 14,987.20, 20,684.08 and 9,021.84

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Solution

The fourth proportional to 14,987.20, 20,684.08 and 9,021.84 is: 12,451.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,987.20 : 20,684.08 = 9,021.84 : x
  2. Step 2: Convert to fraction form
    14,987.20/20,684.08 = 9,021.84/x
  3. Step 3: Cross multiply
    14,987.20x = 20,684.08 × 9,021.84
  4. Step 4: Simplify right side
    14,987.20x = 186,608,460.31
  5. Step 5: Solve for x
    x = 186,608,460.31/14,987.20
  6. Step 6: Final answer
    x = 12,451.19

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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.