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Finding the Fourth Proportional to 8,515.98, 11,752.12 and 4,978.50

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Solution

The fourth proportional to 8,515.98, 11,752.12 and 4,978.50 is: 6,870.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,515.98 : 11,752.12 = 4,978.50 : x
  2. Step 2: Convert to fraction form
    8,515.98/11,752.12 = 4,978.50/x
  3. Step 3: Cross multiply
    8,515.98x = 11,752.12 × 4,978.50
  4. Step 4: Simplify right side
    8,515.98x = 58,507,929.42
  5. Step 5: Solve for x
    x = 58,507,929.42/8,515.98
  6. Step 6: Final answer
    x = 6,870.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.