Home / 20,775.02-31,116.05-9,665.06

Finding the Fourth Proportional to 20,775.02, 31,116.05 and 9,665.06

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Solution

The fourth proportional to 20,775.02, 31,116.05 and 9,665.06 is: 14,475.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,775.02 : 31,116.05 = 9,665.06 : x
  2. Step 2: Convert to fraction form
    20,775.02/31,116.05 = 9,665.06/x
  3. Step 3: Cross multiply
    20,775.02x = 31,116.05 × 9,665.06
  4. Step 4: Simplify right side
    20,775.02x = 300,738,490.21
  5. Step 5: Solve for x
    x = 300,738,490.21/20,775.02
  6. Step 6: Final answer
    x = 14,475.97

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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.