Home / 30,984.12-42,764.28-18,406.44

Finding the Fourth Proportional to 30,984.12, 42,764.28 and 18,406.44

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Solution

The fourth proportional to 30,984.12, 42,764.28 and 18,406.44 is: 25,404.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,984.12 : 42,764.28 = 18,406.44 : x
  2. Step 2: Convert to fraction form
    30,984.12/42,764.28 = 18,406.44/x
  3. Step 3: Cross multiply
    30,984.12x = 42,764.28 × 18,406.44
  4. Step 4: Simplify right side
    30,984.12x = 787,138,153.96
  5. Step 5: Solve for x
    x = 787,138,153.96/30,984.12
  6. Step 6: Final answer
    x = 25,404.57

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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.