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Finding the Fourth Proportional to 15,191.68, 20,962.80 and 8,816.32

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Solution

The fourth proportional to 15,191.68, 20,962.80 and 8,816.32 is: 12,165.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,191.68 : 20,962.80 = 8,816.32 : x
  2. Step 2: Convert to fraction form
    15,191.68/20,962.80 = 8,816.32/x
  3. Step 3: Cross multiply
    15,191.68x = 20,962.80 × 8,816.32
  4. Step 4: Simplify right side
    15,191.68x = 184,814,752.90
  5. Step 5: Solve for x
    x = 184,814,752.90/15,191.68
  6. Step 6: Final answer
    x = 12,165.52

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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.