Home / 20,685.17-31,015.25-9,285.03

Finding the Fourth Proportional to 20,685.17, 31,015.25 and 9,285.03

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Solution

The fourth proportional to 20,685.17, 31,015.25 and 9,285.03 is: 13,921.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,685.17 : 31,015.25 = 9,285.03 : x
  2. Step 2: Convert to fraction form
    20,685.17/31,015.25 = 9,285.03/x
  3. Step 3: Cross multiply
    20,685.17x = 31,015.25 × 9,285.03
  4. Step 4: Simplify right side
    20,685.17x = 287,977,567.33
  5. Step 5: Solve for x
    x = 287,977,567.33/20,685.17
  6. Step 6: Final answer
    x = 13,921.93

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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.