Home / 28,395.89-39,186.60-15,649.53

Finding the Fourth Proportional to 28,395.89, 39,186.60 and 15,649.53

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Solution

The fourth proportional to 28,395.89, 39,186.60 and 15,649.53 is: 21,596.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,395.89 : 39,186.60 = 15,649.53 : x
  2. Step 2: Convert to fraction form
    28,395.89/39,186.60 = 15,649.53/x
  3. Step 3: Cross multiply
    28,395.89x = 39,186.60 × 15,649.53
  4. Step 4: Simplify right side
    28,395.89x = 613,251,964.20
  5. Step 5: Solve for x
    x = 613,251,964.20/28,395.89
  6. Step 6: Final answer
    x = 21,596.50

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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.