Home / 12,465.72-18,693.12-6,621

Finding the Fourth Proportional to 12,465.72, 18,693.12 and 6,621

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Solution

The fourth proportional to 12,465.72, 18,693.12 and 6,621 is: 9,928.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,465.72 : 18,693.12 = 6,621 : x
  2. Step 2: Convert to fraction form
    12,465.72/18,693.12 = 6,621/x
  3. Step 3: Cross multiply
    12,465.72x = 18,693.12 × 6,621
  4. Step 4: Simplify right side
    12,465.72x = 123,767,147.52
  5. Step 5: Solve for x
    x = 123,767,147.52/12,465.72
  6. Step 6: Final answer
    x = 9,928.60

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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.