Home / 56,057.20-84,118.20-21,000.40

Finding the Fourth Proportional to 56,057.20, 84,118.20 and 21,000.40

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Solution

The fourth proportional to 56,057.20, 84,118.20 and 21,000.40 is: 31,512.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,057.20 : 84,118.20 = 21,000.40 : x
  2. Step 2: Convert to fraction form
    56,057.20/84,118.20 = 21,000.40/x
  3. Step 3: Cross multiply
    56,057.20x = 84,118.20 × 21,000.40
  4. Step 4: Simplify right side
    56,057.20x = 1,766,515,847.28
  5. Step 5: Solve for x
    x = 1,766,515,847.28/56,057.20
  6. Step 6: Final answer
    x = 31,512.74

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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.