Home / 15,580.55-21,511.47-9,620.97

Finding the Fourth Proportional to 15,580.55, 21,511.47 and 9,620.97

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Solution

The fourth proportional to 15,580.55, 21,511.47 and 9,620.97 is: 13,283.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,580.55 : 21,511.47 = 9,620.97 : x
  2. Step 2: Convert to fraction form
    15,580.55/21,511.47 = 9,620.97/x
  3. Step 3: Cross multiply
    15,580.55x = 21,511.47 × 9,620.97
  4. Step 4: Simplify right side
    15,580.55x = 206,961,207.53
  5. Step 5: Solve for x
    x = 206,961,207.53/15,580.55
  6. Step 6: Final answer
    x = 13,283.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.