Home / 42,890.96-64,380.02-20,722.98

Finding the Fourth Proportional to 42,890.96, 64,380.02 and 20,722.98

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Solution

The fourth proportional to 42,890.96, 64,380.02 and 20,722.98 is: 31,105.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,890.96 : 64,380.02 = 20,722.98 : x
  2. Step 2: Convert to fraction form
    42,890.96/64,380.02 = 20,722.98/x
  3. Step 3: Cross multiply
    42,890.96x = 64,380.02 × 20,722.98
  4. Step 4: Simplify right side
    42,890.96x = 1,334,145,763.24
  5. Step 5: Solve for x
    x = 1,334,145,763.24/42,890.96
  6. Step 6: Final answer
    x = 31,105.53

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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.