Home / 13,338.22-18,407.10-7,963.78

Finding the Fourth Proportional to 13,338.22, 18,407.10 and 7,963.78

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Solution

The fourth proportional to 13,338.22, 18,407.10 and 7,963.78 is: 10,990.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,338.22 : 18,407.10 = 7,963.78 : x
  2. Step 2: Convert to fraction form
    13,338.22/18,407.10 = 7,963.78/x
  3. Step 3: Cross multiply
    13,338.22x = 18,407.10 × 7,963.78
  4. Step 4: Simplify right side
    13,338.22x = 146,590,094.84
  5. Step 5: Solve for x
    x = 146,590,094.84/13,338.22
  6. Step 6: Final answer
    x = 10,990.23

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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.