Home / 13,428.90-18,531.48-7,379.16

Finding the Fourth Proportional to 13,428.90, 18,531.48 and 7,379.16

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Solution

The fourth proportional to 13,428.90, 18,531.48 and 7,379.16 is: 10,183.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,428.90 : 18,531.48 = 7,379.16 : x
  2. Step 2: Convert to fraction form
    13,428.90/18,531.48 = 7,379.16/x
  3. Step 3: Cross multiply
    13,428.90x = 18,531.48 × 7,379.16
  4. Step 4: Simplify right side
    13,428.90x = 136,746,755.96
  5. Step 5: Solve for x
    x = 136,746,755.96/13,428.90
  6. Step 6: Final answer
    x = 10,183.02

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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.