Home / 5,118.48-7,676.78-1,421.01

Finding the Fourth Proportional to 5,118.48, 7,676.78 and 1,421.01

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Solution

The fourth proportional to 5,118.48, 7,676.78 and 1,421.01 is: 2,131.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,118.48 : 7,676.78 = 1,421.01 : x
  2. Step 2: Convert to fraction form
    5,118.48/7,676.78 = 1,421.01/x
  3. Step 3: Cross multiply
    5,118.48x = 7,676.78 × 1,421.01
  4. Step 4: Simplify right side
    5,118.48x = 10,908,774.04
  5. Step 5: Solve for x
    x = 10,908,774.04/5,118.48
  6. Step 6: Final answer
    x = 2,131.25

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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.