Home / 13,428.06-18,531.25-9,188.01

Finding the Fourth Proportional to 13,428.06, 18,531.25 and 9,188.01

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Solution

The fourth proportional to 13,428.06, 18,531.25 and 9,188.01 is: 12,679.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,428.06 : 18,531.25 = 9,188.01 : x
  2. Step 2: Convert to fraction form
    13,428.06/18,531.25 = 9,188.01/x
  3. Step 3: Cross multiply
    13,428.06x = 18,531.25 × 9,188.01
  4. Step 4: Simplify right side
    13,428.06x = 170,265,287.34
  5. Step 5: Solve for x
    x = 170,265,287.34/13,428.06
  6. Step 6: Final answer
    x = 12,679.81

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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.