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Finding the Fourth Proportional to 18,750.42, 25,864.11 and 12,784.86

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Solution

The fourth proportional to 18,750.42, 25,864.11 and 12,784.86 is: 17,635.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,750.42 : 25,864.11 = 12,784.86 : x
  2. Step 2: Convert to fraction form
    18,750.42/25,864.11 = 12,784.86/x
  3. Step 3: Cross multiply
    18,750.42x = 25,864.11 × 12,784.86
  4. Step 4: Simplify right side
    18,750.42x = 330,669,025.37
  5. Step 5: Solve for x
    x = 330,669,025.37/18,750.42
  6. Step 6: Final answer
    x = 17,635.29

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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.