Home / 42,720.60-64,087.56-20,529.84

Finding the Fourth Proportional to 42,720.60, 64,087.56 and 20,529.84

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Solution

The fourth proportional to 42,720.60, 64,087.56 and 20,529.84 is: 30,797.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,720.60 : 64,087.56 = 20,529.84 : x
  2. Step 2: Convert to fraction form
    42,720.60/64,087.56 = 20,529.84/x
  3. Step 3: Cross multiply
    42,720.60x = 64,087.56 × 20,529.84
  4. Step 4: Simplify right side
    42,720.60x = 1,315,707,352.79
  5. Step 5: Solve for x
    x = 1,315,707,352.79/42,720.60
  6. Step 6: Final answer
    x = 30,797.96

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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.