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Finding the Fourth Proportional to 35,280.64, 48,679.68 and 20,368

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Solution

The fourth proportional to 35,280.64, 48,679.68 and 20,368 is: 28,103.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,280.64 : 48,679.68 = 20,368 : x
  2. Step 2: Convert to fraction form
    35,280.64/48,679.68 = 20,368/x
  3. Step 3: Cross multiply
    35,280.64x = 48,679.68 × 20,368
  4. Step 4: Simplify right side
    35,280.64x = 991,507,722.24
  5. Step 5: Solve for x
    x = 991,507,722.24/35,280.64
  6. Step 6: Final answer
    x = 28,103.45

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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.