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Finding the Fourth Proportional to 35,397.64, 48,840.90 and 20,485

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Solution

The fourth proportional to 35,397.64, 48,840.90 and 20,485 is: 28,264.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,397.64 : 48,840.90 = 20,485 : x
  2. Step 2: Convert to fraction form
    35,397.64/48,840.90 = 20,485/x
  3. Step 3: Cross multiply
    35,397.64x = 48,840.90 × 20,485
  4. Step 4: Simplify right side
    35,397.64x = 1,000,505,836.50
  5. Step 5: Solve for x
    x = 1,000,505,836.50/35,397.64
  6. Step 6: Final answer
    x = 28,264.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.