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Finding the Fourth Proportional to 13,658.13, 20,495.15 and 5,760.15

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Solution

The fourth proportional to 13,658.13, 20,495.15 and 5,760.15 is: 8,643.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,658.13 : 20,495.15 = 5,760.15 : x
  2. Step 2: Convert to fraction form
    13,658.13/20,495.15 = 5,760.15/x
  3. Step 3: Cross multiply
    13,658.13x = 20,495.15 × 5,760.15
  4. Step 4: Simplify right side
    13,658.13x = 118,055,109.47
  5. Step 5: Solve for x
    x = 118,055,109.47/13,658.13
  6. Step 6: Final answer
    x = 8,643.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.