Home / 21,289.72-31,934.78-7,438.76

Finding the Fourth Proportional to 21,289.72, 31,934.78 and 7,438.76

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Solution

The fourth proportional to 21,289.72, 31,934.78 and 7,438.76 is: 11,158.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,289.72 : 31,934.78 = 7,438.76 : x
  2. Step 2: Convert to fraction form
    21,289.72/31,934.78 = 7,438.76/x
  3. Step 3: Cross multiply
    21,289.72x = 31,934.78 × 7,438.76
  4. Step 4: Simplify right side
    21,289.72x = 237,555,164.07
  5. Step 5: Solve for x
    x = 237,555,164.07/21,289.72
  6. Step 6: Final answer
    x = 11,158.21

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1.5x scale

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.