Home / 43,155.06-64,638.90-20,921.78

Finding the Fourth Proportional to 43,155.06, 64,638.90 and 20,921.78

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Solution

The fourth proportional to 43,155.06, 64,638.90 and 20,921.78 is: 31,337.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,155.06 : 64,638.90 = 20,921.78 : x
  2. Step 2: Convert to fraction form
    43,155.06/64,638.90 = 20,921.78/x
  3. Step 3: Cross multiply
    43,155.06x = 64,638.90 × 20,921.78
  4. Step 4: Simplify right side
    43,155.06x = 1,352,360,522.05
  5. Step 5: Solve for x
    x = 1,352,360,522.05/43,155.06
  6. Step 6: Final answer
    x = 31,337.24

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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.