Home / 42,899.78-64,333.47-20,705.78

Finding the Fourth Proportional to 42,899.78, 64,333.47 and 20,705.78

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Solution

The fourth proportional to 42,899.78, 64,333.47 and 20,705.78 is: 31,050.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,899.78 : 64,333.47 = 20,705.78 : x
  2. Step 2: Convert to fraction form
    42,899.78/64,333.47 = 20,705.78/x
  3. Step 3: Cross multiply
    42,899.78x = 64,333.47 × 20,705.78
  4. Step 4: Simplify right side
    42,899.78x = 1,332,074,676.46
  5. Step 5: Solve for x
    x = 1,332,074,676.46/42,899.78
  6. Step 6: Final answer
    x = 31,050.85

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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.