Home / 21,288.72-31,933.28-7,437.76

Finding the Fourth Proportional to 21,288.72, 31,933.28 and 7,437.76

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Solution

The fourth proportional to 21,288.72, 31,933.28 and 7,437.76 is: 11,156.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,288.72 : 31,933.28 = 7,437.76 : x
  2. Step 2: Convert to fraction form
    21,288.72/31,933.28 = 7,437.76/x
  3. Step 3: Cross multiply
    21,288.72x = 31,933.28 × 7,437.76
  4. Step 4: Simplify right side
    21,288.72x = 237,512,072.65
  5. Step 5: Solve for x
    x = 237,512,072.65/21,288.72
  6. Step 6: Final answer
    x = 11,156.71

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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.