Home / 21,280.83-31,921.23-9,580.38

Finding the Fourth Proportional to 21,280.83, 31,921.23 and 9,580.38

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Solution

The fourth proportional to 21,280.83, 31,921.23 and 9,580.38 is: 14,370.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,280.83 : 31,921.23 = 9,580.38 : x
  2. Step 2: Convert to fraction form
    21,280.83/31,921.23 = 9,580.38/x
  3. Step 3: Cross multiply
    21,280.83x = 31,921.23 × 9,580.38
  4. Step 4: Simplify right side
    21,280.83x = 305,817,513.47
  5. Step 5: Solve for x
    x = 305,817,513.47/21,280.83
  6. Step 6: Final answer
    x = 14,370.56

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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.