Home / 5,218.77-7,830.69-2,586.51

Finding the Fourth Proportional to 5,218.77, 7,830.69 and 2,586.51

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Solution

The fourth proportional to 5,218.77, 7,830.69 and 2,586.51 is: 3,881.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,218.77 : 7,830.69 = 2,586.51 : x
  2. Step 2: Convert to fraction form
    5,218.77/7,830.69 = 2,586.51/x
  3. Step 3: Cross multiply
    5,218.77x = 7,830.69 × 2,586.51
  4. Step 4: Simplify right side
    5,218.77x = 20,254,157.99
  5. Step 5: Solve for x
    x = 20,254,157.99/5,218.77
  6. Step 6: Final answer
    x = 3,881.02

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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.