Home / 31,438.46-47,128.40-21,582.38

Finding the Fourth Proportional to 31,438.46, 47,128.40 and 21,582.38

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Solution

The fourth proportional to 31,438.46, 47,128.40 and 21,582.38 is: 32,353.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,438.46 : 47,128.40 = 21,582.38 : x
  2. Step 2: Convert to fraction form
    31,438.46/47,128.40 = 21,582.38/x
  3. Step 3: Cross multiply
    31,438.46x = 47,128.40 × 21,582.38
  4. Step 4: Simplify right side
    31,438.46x = 1,017,143,037.59
  5. Step 5: Solve for x
    x = 1,017,143,037.59/31,438.46
  6. Step 6: Final answer
    x = 32,353.46

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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.