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Finding the Fourth Proportional to 35,245, 48,643.86 and 20,349.64

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Solution

The fourth proportional to 35,245, 48,643.86 and 20,349.64 is: 28,085.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,245 : 48,643.86 = 20,349.64 : x
  2. Step 2: Convert to fraction form
    35,245/48,643.86 = 20,349.64/x
  3. Step 3: Cross multiply
    35,245x = 48,643.86 × 20,349.64
  4. Step 4: Simplify right side
    35,245x = 989,885,039.21
  5. Step 5: Solve for x
    x = 989,885,039.21/35,245
  6. Step 6: Final answer
    x = 28,085.83

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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.