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Finding the Fourth Proportional to 8,990.88, 13,465.53 and 8,679.48

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Solution

The fourth proportional to 8,990.88, 13,465.53 and 8,679.48 is: 12,999.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,990.88 : 13,465.53 = 8,679.48 : x
  2. Step 2: Convert to fraction form
    8,990.88/13,465.53 = 8,679.48/x
  3. Step 3: Cross multiply
    8,990.88x = 13,465.53 × 8,679.48
  4. Step 4: Simplify right side
    8,990.88x = 116,873,798.32
  5. Step 5: Solve for x
    x = 116,873,798.32/8,990.88
  6. Step 6: Final answer
    x = 12,999.15

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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.