Home / 5,207.86-7,812.15-1,921.19

Finding the Fourth Proportional to 5,207.86, 7,812.15 and 1,921.19

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Solution

The fourth proportional to 5,207.86, 7,812.15 and 1,921.19 is: 2,881.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,207.86 : 7,812.15 = 1,921.19 : x
  2. Step 2: Convert to fraction form
    5,207.86/7,812.15 = 1,921.19/x
  3. Step 3: Cross multiply
    5,207.86x = 7,812.15 × 1,921.19
  4. Step 4: Simplify right side
    5,207.86x = 15,008,578.19
  5. Step 5: Solve for x
    x = 15,008,578.19/5,207.86
  6. Step 6: Final answer
    x = 2,881.91

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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.