Home / 13,388.06-18,475.04-7,420.28

Finding the Fourth Proportional to 13,388.06, 18,475.04 and 7,420.28

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Solution

The fourth proportional to 13,388.06, 18,475.04 and 7,420.28 is: 10,239.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,388.06 : 18,475.04 = 7,420.28 : x
  2. Step 2: Convert to fraction form
    13,388.06/18,475.04 = 7,420.28/x
  3. Step 3: Cross multiply
    13,388.06x = 18,475.04 × 7,420.28
  4. Step 4: Simplify right side
    13,388.06x = 137,089,895.99
  5. Step 5: Solve for x
    x = 137,089,895.99/13,388.06
  6. Step 6: Final answer
    x = 10,239.71

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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.