Home / 42,780.11-64,181.10-17,811.86

Finding the Fourth Proportional to 42,780.11, 64,181.10 and 17,811.86

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Solution

The fourth proportional to 42,780.11, 64,181.10 and 17,811.86 is: 26,722.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,780.11 : 64,181.10 = 17,811.86 : x
  2. Step 2: Convert to fraction form
    42,780.11/64,181.10 = 17,811.86/x
  3. Step 3: Cross multiply
    42,780.11x = 64,181.10 × 17,811.86
  4. Step 4: Simplify right side
    42,780.11x = 1,143,184,678.79
  5. Step 5: Solve for x
    x = 1,143,184,678.79/42,780.11
  6. Step 6: Final answer
    x = 26,722.34

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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.