Home / 5,381.15-8,072.53-1,918.13

Finding the Fourth Proportional to 5,381.15, 8,072.53 and 1,918.13

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Solution

The fourth proportional to 5,381.15, 8,072.53 and 1,918.13 is: 2,877.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,381.15 : 8,072.53 = 1,918.13 : x
  2. Step 2: Convert to fraction form
    5,381.15/8,072.53 = 1,918.13/x
  3. Step 3: Cross multiply
    5,381.15x = 8,072.53 × 1,918.13
  4. Step 4: Simplify right side
    5,381.15x = 15,484,116.81
  5. Step 5: Solve for x
    x = 15,484,116.81/5,381.15
  6. Step 6: Final answer
    x = 2,877.48

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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.