Home / 30,878.91-42,613.04-16,731.75

Finding the Fourth Proportional to 30,878.91, 42,613.04 and 16,731.75

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Solution

The fourth proportional to 30,878.91, 42,613.04 and 16,731.75 is: 23,089.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,878.91 : 42,613.04 = 16,731.75 : x
  2. Step 2: Convert to fraction form
    30,878.91/42,613.04 = 16,731.75/x
  3. Step 3: Cross multiply
    30,878.91x = 42,613.04 × 16,731.75
  4. Step 4: Simplify right side
    30,878.91x = 712,990,773.85
  5. Step 5: Solve for x
    x = 712,990,773.85/30,878.91
  6. Step 6: Final answer
    x = 23,089.89

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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.