Home / 30,372.76-45,528.90-21,119.32

Finding the Fourth Proportional to 30,372.76, 45,528.90 and 21,119.32

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Solution

The fourth proportional to 30,372.76, 45,528.90 and 21,119.32 is: 31,657.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,372.76 : 45,528.90 = 21,119.32 : x
  2. Step 2: Convert to fraction form
    30,372.76/45,528.90 = 21,119.32/x
  3. Step 3: Cross multiply
    30,372.76x = 45,528.90 × 21,119.32
  4. Step 4: Simplify right side
    30,372.76x = 961,539,408.35
  5. Step 5: Solve for x
    x = 961,539,408.35/30,372.76
  6. Step 6: Final answer
    x = 31,657.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.