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Finding the Fourth Proportional to 13,455.16, 20,182.74 and 4,095.16

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Solution

The fourth proportional to 13,455.16, 20,182.74 and 4,095.16 is: 6,142.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,455.16 : 20,182.74 = 4,095.16 : x
  2. Step 2: Convert to fraction form
    13,455.16/20,182.74 = 4,095.16/x
  3. Step 3: Cross multiply
    13,455.16x = 20,182.74 × 4,095.16
  4. Step 4: Simplify right side
    13,455.16x = 82,651,549.54
  5. Step 5: Solve for x
    x = 82,651,549.54/13,455.16
  6. Step 6: Final answer
    x = 6,142.74

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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.