Home / 31,421.96-47,120.64-11,689.75

Finding the Fourth Proportional to 31,421.96, 47,120.64 and 11,689.75

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Solution

The fourth proportional to 31,421.96, 47,120.64 and 11,689.75 is: 17,530.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,421.96 : 47,120.64 = 11,689.75 : x
  2. Step 2: Convert to fraction form
    31,421.96/47,120.64 = 11,689.75/x
  3. Step 3: Cross multiply
    31,421.96x = 47,120.64 × 11,689.75
  4. Step 4: Simplify right side
    31,421.96x = 550,828,516.50
  5. Step 5: Solve for x
    x = 550,828,516.50/31,421.96
  6. Step 6: Final answer
    x = 17,530.05

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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.