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Finding the Fourth Proportional to 6,987.95, 9,644.05 and 5,216.48

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Solution

The fourth proportional to 6,987.95, 9,644.05 and 5,216.48 is: 7,199.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,987.95 : 9,644.05 = 5,216.48 : x
  2. Step 2: Convert to fraction form
    6,987.95/9,644.05 = 5,216.48/x
  3. Step 3: Cross multiply
    6,987.95x = 9,644.05 × 5,216.48
  4. Step 4: Simplify right side
    6,987.95x = 50,308,031.10
  5. Step 5: Solve for x
    x = 50,308,031.10/6,987.95
  6. Step 6: Final answer
    x = 7,199.25

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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.