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Finding the Fourth Proportional to 18,612.99, 25,708.19 and 13,569.12

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Solution

The fourth proportional to 18,612.99, 25,708.19 and 13,569.12 is: 18,741.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,612.99 : 25,708.19 = 13,569.12 : x
  2. Step 2: Convert to fraction form
    18,612.99/25,708.19 = 13,569.12/x
  3. Step 3: Cross multiply
    18,612.99x = 25,708.19 × 13,569.12
  4. Step 4: Simplify right side
    18,612.99x = 348,837,447.25
  5. Step 5: Solve for x
    x = 348,837,447.25/18,612.99
  6. Step 6: Final answer
    x = 18,741.61

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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.