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Finding the Fourth Proportional to 5,687.83, 8,515.54 and 5,130.55

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Solution

The fourth proportional to 5,687.83, 8,515.54 and 5,130.55 is: 7,681.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,687.83 : 8,515.54 = 5,130.55 : x
  2. Step 2: Convert to fraction form
    5,687.83/8,515.54 = 5,130.55/x
  3. Step 3: Cross multiply
    5,687.83x = 8,515.54 × 5,130.55
  4. Step 4: Simplify right side
    5,687.83x = 43,689,403.75
  5. Step 5: Solve for x
    x = 43,689,403.75/5,687.83
  6. Step 6: Final answer
    x = 7,681.21

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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.