Home / 30,876.24-42,611.34-18,781.45

Finding the Fourth Proportional to 30,876.24, 42,611.34 and 18,781.45

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Solution

The fourth proportional to 30,876.24, 42,611.34 and 18,781.45 is: 25,919.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,876.24 : 42,611.34 = 18,781.45 : x
  2. Step 2: Convert to fraction form
    30,876.24/42,611.34 = 18,781.45/x
  3. Step 3: Cross multiply
    30,876.24x = 42,611.34 × 18,781.45
  4. Step 4: Simplify right side
    30,876.24x = 800,302,715.55
  5. Step 5: Solve for x
    x = 800,302,715.55/30,876.24
  6. Step 6: Final answer
    x = 25,919.69

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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.