Home / 30,981.81-42,755.16-16,834.66

Finding the Fourth Proportional to 30,981.81, 42,755.16 and 16,834.66

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Solution

The fourth proportional to 30,981.81, 42,755.16 and 16,834.66 is: 23,231.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,981.81 : 42,755.16 = 16,834.66 : x
  2. Step 2: Convert to fraction form
    30,981.81/42,755.16 = 16,834.66/x
  3. Step 3: Cross multiply
    30,981.81x = 42,755.16 × 16,834.66
  4. Step 4: Simplify right side
    30,981.81x = 719,768,474.96
  5. Step 5: Solve for x
    x = 719,768,474.96/30,981.81
  6. Step 6: Final answer
    x = 23,231.97

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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.