Home / 42,857.96-64,288.99-20,689.98

Finding the Fourth Proportional to 42,857.96, 64,288.99 and 20,689.98

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Solution

The fourth proportional to 42,857.96, 64,288.99 and 20,689.98 is: 31,035.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,857.96 : 64,288.99 = 20,689.98 : x
  2. Step 2: Convert to fraction form
    42,857.96/64,288.99 = 20,689.98/x
  3. Step 3: Cross multiply
    42,857.96x = 64,288.99 × 20,689.98
  4. Step 4: Simplify right side
    42,857.96x = 1,330,138,063.72
  5. Step 5: Solve for x
    x = 1,330,138,063.72/42,857.96
  6. Step 6: Final answer
    x = 31,035.96

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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.