Home / 5,415.78-8,123.96-1,718.30

Finding the Fourth Proportional to 5,415.78, 8,123.96 and 1,718.30

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Solution

The fourth proportional to 5,415.78, 8,123.96 and 1,718.30 is: 2,577.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,415.78 : 8,123.96 = 1,718.30 : x
  2. Step 2: Convert to fraction form
    5,415.78/8,123.96 = 1,718.30/x
  3. Step 3: Cross multiply
    5,415.78x = 8,123.96 × 1,718.30
  4. Step 4: Simplify right side
    5,415.78x = 13,959,400.47
  5. Step 5: Solve for x
    x = 13,959,400.47/5,415.78
  6. Step 6: Final answer
    x = 2,577.54

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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.