Home / 12,490.02-17,239.70-7,186.55

Finding the Fourth Proportional to 12,490.02, 17,239.70 and 7,186.55

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Solution

The fourth proportional to 12,490.02, 17,239.70 and 7,186.55 is: 9,919.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,490.02 : 17,239.70 = 7,186.55 : x
  2. Step 2: Convert to fraction form
    12,490.02/17,239.70 = 7,186.55/x
  3. Step 3: Cross multiply
    12,490.02x = 17,239.70 × 7,186.55
  4. Step 4: Simplify right side
    12,490.02x = 123,893,897.80
  5. Step 5: Solve for x
    x = 123,893,897.80/12,490.02
  6. Step 6: Final answer
    x = 9,919.43

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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.