Home / 42,708.84-64,074.96-20,540.76

Finding the Fourth Proportional to 42,708.84, 64,074.96 and 20,540.76

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Solution

The fourth proportional to 42,708.84, 64,074.96 and 20,540.76 is: 30,816.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,708.84 : 64,074.96 = 20,540.76 : x
  2. Step 2: Convert to fraction form
    42,708.84/64,074.96 = 20,540.76/x
  3. Step 3: Cross multiply
    42,708.84x = 64,074.96 × 20,540.76
  4. Step 4: Simplify right side
    42,708.84x = 1,316,148,375.37
  5. Step 5: Solve for x
    x = 1,316,148,375.37/42,708.84
  6. Step 6: Final answer
    x = 30,816.77

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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.