Home / 45,385.92-68,018.40-20,420.64

Finding the Fourth Proportional to 45,385.92, 68,018.40 and 20,420.64

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Solution

The fourth proportional to 45,385.92, 68,018.40 and 20,420.64 is: 30,603.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,385.92 : 68,018.40 = 20,420.64 : x
  2. Step 2: Convert to fraction form
    45,385.92/68,018.40 = 20,420.64/x
  3. Step 3: Cross multiply
    45,385.92x = 68,018.40 × 20,420.64
  4. Step 4: Simplify right side
    45,385.92x = 1,388,979,259.78
  5. Step 5: Solve for x
    x = 1,388,979,259.78/45,385.92
  6. Step 6: Final answer
    x = 30,603.75

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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.