Home / 20,945.61-31,422.89-6,905.07

Finding the Fourth Proportional to 20,945.61, 31,422.89 and 6,905.07

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Solution

The fourth proportional to 20,945.61, 31,422.89 and 6,905.07 is: 10,359.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,945.61 : 31,422.89 = 6,905.07 : x
  2. Step 2: Convert to fraction form
    20,945.61/31,422.89 = 6,905.07/x
  3. Step 3: Cross multiply
    20,945.61x = 31,422.89 × 6,905.07
  4. Step 4: Simplify right side
    20,945.61x = 216,977,255.05
  5. Step 5: Solve for x
    x = 216,977,255.05/20,945.61
  6. Step 6: Final answer
    x = 10,359.08

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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.