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Finding the Fourth Proportional to 12,465.76, 18,693.12 and 6,621.12

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Solution

The fourth proportional to 12,465.76, 18,693.12 and 6,621.12 is: 9,928.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,465.76 : 18,693.12 = 6,621.12 : x
  2. Step 2: Convert to fraction form
    12,465.76/18,693.12 = 6,621.12/x
  3. Step 3: Cross multiply
    12,465.76x = 18,693.12 × 6,621.12
  4. Step 4: Simplify right side
    12,465.76x = 123,769,390.69
  5. Step 5: Solve for x
    x = 123,769,390.69/12,465.76
  6. Step 6: Final answer
    x = 9,928.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.