Home / 21,007.46-31,516.65-7,860.87

Finding the Fourth Proportional to 21,007.46, 31,516.65 and 7,860.87

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Solution

The fourth proportional to 21,007.46, 31,516.65 and 7,860.87 is: 11,793.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,007.46 : 31,516.65 = 7,860.87 : x
  2. Step 2: Convert to fraction form
    21,007.46/31,516.65 = 7,860.87/x
  3. Step 3: Cross multiply
    21,007.46x = 31,516.65 × 7,860.87
  4. Step 4: Simplify right side
    21,007.46x = 247,748,288.49
  5. Step 5: Solve for x
    x = 247,748,288.49/21,007.46
  6. Step 6: Final answer
    x = 11,793.35

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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.