Home / 13,720.48-18,934.62-8,412.24

Finding the Fourth Proportional to 13,720.48, 18,934.62 and 8,412.24

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Solution

The fourth proportional to 13,720.48, 18,934.62 and 8,412.24 is: 11,609.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,720.48 : 18,934.62 = 8,412.24 : x
  2. Step 2: Convert to fraction form
    13,720.48/18,934.62 = 8,412.24/x
  3. Step 3: Cross multiply
    13,720.48x = 18,934.62 × 8,412.24
  4. Step 4: Simplify right side
    13,720.48x = 159,282,567.75
  5. Step 5: Solve for x
    x = 159,282,567.75/13,720.48
  6. Step 6: Final answer
    x = 11,609.11

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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.