Home / 13,388.90-18,476.82-7,420.66

Finding the Fourth Proportional to 13,388.90, 18,476.82 and 7,420.66

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Solution

The fourth proportional to 13,388.90, 18,476.82 and 7,420.66 is: 10,240.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,388.90 : 18,476.82 = 7,420.66 : x
  2. Step 2: Convert to fraction form
    13,388.90/18,476.82 = 7,420.66/x
  3. Step 3: Cross multiply
    13,388.90x = 18,476.82 × 7,420.66
  4. Step 4: Simplify right side
    13,388.90x = 137,110,199.10
  5. Step 5: Solve for x
    x = 137,110,199.10/13,388.90
  6. Step 6: Final answer
    x = 10,240.59

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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.