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Finding the Fourth Proportional to 18,613.51, 25,737.15 and 18,313.05

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Solution

The fourth proportional to 18,613.51, 25,737.15 and 18,313.05 is: 25,321.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,613.51 : 25,737.15 = 18,313.05 : x
  2. Step 2: Convert to fraction form
    18,613.51/25,737.15 = 18,313.05/x
  3. Step 3: Cross multiply
    18,613.51x = 25,737.15 × 18,313.05
  4. Step 4: Simplify right side
    18,613.51x = 471,325,714.81
  5. Step 5: Solve for x
    x = 471,325,714.81/18,613.51
  6. Step 6: Final answer
    x = 25,321.70

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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.