Home / 12,097.50-16,656.36-10,990.20

Finding the Fourth Proportional to 12,097.50, 16,656.36 and 10,990.20

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Solution

The fourth proportional to 12,097.50, 16,656.36 and 10,990.20 is: 15,131.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,097.50 : 16,656.36 = 10,990.20 : x
  2. Step 2: Convert to fraction form
    12,097.50/16,656.36 = 10,990.20/x
  3. Step 3: Cross multiply
    12,097.50x = 16,656.36 × 10,990.20
  4. Step 4: Simplify right side
    12,097.50x = 183,056,727.67
  5. Step 5: Solve for x
    x = 183,056,727.67/12,097.50
  6. Step 6: Final answer
    x = 15,131.78

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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.