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Finding the Fourth Proportional to 30,798.80, 42,502.20 and 16,651.52

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Solution

The fourth proportional to 30,798.80, 42,502.20 and 16,651.52 is: 22,979.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,798.80 : 42,502.20 = 16,651.52 : x
  2. Step 2: Convert to fraction form
    30,798.80/42,502.20 = 16,651.52/x
  3. Step 3: Cross multiply
    30,798.80x = 42,502.20 × 16,651.52
  4. Step 4: Simplify right side
    30,798.80x = 707,726,233.34
  5. Step 5: Solve for x
    x = 707,726,233.34/30,798.80
  6. Step 6: Final answer
    x = 22,979.02

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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.