Home / 5,813.90-8,720.85-1,918.31

Finding the Fourth Proportional to 5,813.90, 8,720.85 and 1,918.31

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Solution

The fourth proportional to 5,813.90, 8,720.85 and 1,918.31 is: 2,877.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,813.90 : 8,720.85 = 1,918.31 : x
  2. Step 2: Convert to fraction form
    5,813.90/8,720.85 = 1,918.31/x
  3. Step 3: Cross multiply
    5,813.90x = 8,720.85 × 1,918.31
  4. Step 4: Simplify right side
    5,813.90x = 16,729,293.76
  5. Step 5: Solve for x
    x = 16,729,293.76/5,813.90
  6. Step 6: Final answer
    x = 2,877.47

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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.