Home / 8,990.30-12,398.59-5,447.36

Finding the Fourth Proportional to 8,990.30, 12,398.59 and 5,447.36

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Solution

The fourth proportional to 8,990.30, 12,398.59 and 5,447.36 is: 7,512.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,990.30 : 12,398.59 = 5,447.36 : x
  2. Step 2: Convert to fraction form
    8,990.30/12,398.59 = 5,447.36/x
  3. Step 3: Cross multiply
    8,990.30x = 12,398.59 × 5,447.36
  4. Step 4: Simplify right side
    8,990.30x = 67,539,583.22
  5. Step 5: Solve for x
    x = 67,539,583.22/8,990.30
  6. Step 6: Final answer
    x = 7,512.49

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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.