Home / 13,388.96-18,476.46-7,420.28

Finding the Fourth Proportional to 13,388.96, 18,476.46 and 7,420.28

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Solution

The fourth proportional to 13,388.96, 18,476.46 and 7,420.28 is: 10,239.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,388.96 : 18,476.46 = 7,420.28 : x
  2. Step 2: Convert to fraction form
    13,388.96/18,476.46 = 7,420.28/x
  3. Step 3: Cross multiply
    13,388.96x = 18,476.46 × 7,420.28
  4. Step 4: Simplify right side
    13,388.96x = 137,100,506.61
  5. Step 5: Solve for x
    x = 137,100,506.61/13,388.96
  6. Step 6: Final answer
    x = 10,239.82

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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.