Home / 5,118.51-7,677.92-1,421.02

Finding the Fourth Proportional to 5,118.51, 7,677.92 and 1,421.02

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Solution

The fourth proportional to 5,118.51, 7,677.92 and 1,421.02 is: 2,131.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,118.51 : 7,677.92 = 1,421.02 : x
  2. Step 2: Convert to fraction form
    5,118.51/7,677.92 = 1,421.02/x
  3. Step 3: Cross multiply
    5,118.51x = 7,677.92 × 1,421.02
  4. Step 4: Simplify right side
    5,118.51x = 10,910,447.84
  5. Step 5: Solve for x
    x = 10,910,447.84/5,118.51
  6. Step 6: Final answer
    x = 2,131.57

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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.