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Finding the Fourth Proportional to 12,319.65, 18,465.75 and 4,922.19

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Solution

The fourth proportional to 12,319.65, 18,465.75 and 4,922.19 is: 7,377.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,319.65 : 18,465.75 = 4,922.19 : x
  2. Step 2: Convert to fraction form
    12,319.65/18,465.75 = 4,922.19/x
  3. Step 3: Cross multiply
    12,319.65x = 18,465.75 × 4,922.19
  4. Step 4: Simplify right side
    12,319.65x = 90,891,929.99
  5. Step 5: Solve for x
    x = 90,891,929.99/12,319.65
  6. Step 6: Final answer
    x = 7,377.80

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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.