Home / 31,421.18-43,354.68-18,678.86

Finding the Fourth Proportional to 31,421.18, 43,354.68 and 18,678.86

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Solution

The fourth proportional to 31,421.18, 43,354.68 and 18,678.86 is: 25,772.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,421.18 : 43,354.68 = 18,678.86 : x
  2. Step 2: Convert to fraction form
    31,421.18/43,354.68 = 18,678.86/x
  3. Step 3: Cross multiply
    31,421.18x = 43,354.68 × 18,678.86
  4. Step 4: Simplify right side
    31,421.18x = 809,815,998.06
  5. Step 5: Solve for x
    x = 809,815,998.06/31,421.18
  6. Step 6: Final answer
    x = 25,772.93

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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.