Home / 20,921.64-31,362.66-7,765.08

Finding the Fourth Proportional to 20,921.64, 31,362.66 and 7,765.08

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Solution

The fourth proportional to 20,921.64, 31,362.66 and 7,765.08 is: 11,640.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,921.64 : 31,362.66 = 7,765.08 : x
  2. Step 2: Convert to fraction form
    20,921.64/31,362.66 = 7,765.08/x
  3. Step 3: Cross multiply
    20,921.64x = 31,362.66 × 7,765.08
  4. Step 4: Simplify right side
    20,921.64x = 243,533,563.91
  5. Step 5: Solve for x
    x = 243,533,563.91/20,921.64
  6. Step 6: Final answer
    x = 11,640.27

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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.