Home / 30,331.55-41,878.88-21,276.15

Finding the Fourth Proportional to 30,331.55, 41,878.88 and 21,276.15

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Solution

The fourth proportional to 30,331.55, 41,878.88 and 21,276.15 is: 29,376.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,331.55 : 41,878.88 = 21,276.15 : x
  2. Step 2: Convert to fraction form
    30,331.55/41,878.88 = 21,276.15/x
  3. Step 3: Cross multiply
    30,331.55x = 41,878.88 × 21,276.15
  4. Step 4: Simplify right side
    30,331.55x = 891,021,226.33
  5. Step 5: Solve for x
    x = 891,021,226.33/30,331.55
  6. Step 6: Final answer
    x = 29,376.06

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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.