Home / 5,118.98-7,677.62-1,421.58

Finding the Fourth Proportional to 5,118.98, 7,677.62 and 1,421.58

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Solution

The fourth proportional to 5,118.98, 7,677.62 and 1,421.58 is: 2,132.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,118.98 : 7,677.62 = 1,421.58 : x
  2. Step 2: Convert to fraction form
    5,118.98/7,677.62 = 1,421.58/x
  3. Step 3: Cross multiply
    5,118.98x = 7,677.62 × 1,421.58
  4. Step 4: Simplify right side
    5,118.98x = 10,914,381.25
  5. Step 5: Solve for x
    x = 10,914,381.25/5,118.98
  6. Step 6: Final answer
    x = 2,132.14

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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.