Home / 15,810.31-21,820.55-9,843.85

Finding the Fourth Proportional to 15,810.31, 21,820.55 and 9,843.85

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Solution

The fourth proportional to 15,810.31, 21,820.55 and 9,843.85 is: 13,585.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,810.31 : 21,820.55 = 9,843.85 : x
  2. Step 2: Convert to fraction form
    15,810.31/21,820.55 = 9,843.85/x
  3. Step 3: Cross multiply
    15,810.31x = 21,820.55 × 9,843.85
  4. Step 4: Simplify right side
    15,810.31x = 214,798,221.12
  5. Step 5: Solve for x
    x = 214,798,221.12/15,810.31
  6. Step 6: Final answer
    x = 13,585.96

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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.