Home / 21,276.45-31,916.25-7,230.78

Finding the Fourth Proportional to 21,276.45, 31,916.25 and 7,230.78

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Solution

The fourth proportional to 21,276.45, 31,916.25 and 7,230.78 is: 10,846.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,276.45 : 31,916.25 = 7,230.78 : x
  2. Step 2: Convert to fraction form
    21,276.45/31,916.25 = 7,230.78/x
  3. Step 3: Cross multiply
    21,276.45x = 31,916.25 × 7,230.78
  4. Step 4: Simplify right side
    21,276.45x = 230,779,382.18
  5. Step 5: Solve for x
    x = 230,779,382.18/21,276.45
  6. Step 6: Final answer
    x = 10,846.71

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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.