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Finding the Fourth Proportional to 30,945.48, 42,704.08 and 16,798.32

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Solution

The fourth proportional to 30,945.48, 42,704.08 and 16,798.32 is: 23,181.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,945.48 : 42,704.08 = 16,798.32 : x
  2. Step 2: Convert to fraction form
    30,945.48/42,704.08 = 16,798.32/x
  3. Step 3: Cross multiply
    30,945.48x = 42,704.08 × 16,798.32
  4. Step 4: Simplify right side
    30,945.48x = 717,356,801.15
  5. Step 5: Solve for x
    x = 717,356,801.15/30,945.48
  6. Step 6: Final answer
    x = 23,181.31

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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.