Home / 30,603.90-45,905.85-21,272.70

Finding the Fourth Proportional to 30,603.90, 45,905.85 and 21,272.70

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Solution

The fourth proportional to 30,603.90, 45,905.85 and 21,272.70 is: 31,909.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,603.90 : 45,905.85 = 21,272.70 : x
  2. Step 2: Convert to fraction form
    30,603.90/45,905.85 = 21,272.70/x
  3. Step 3: Cross multiply
    30,603.90x = 45,905.85 × 21,272.70
  4. Step 4: Simplify right side
    30,603.90x = 976,541,375.30
  5. Step 5: Solve for x
    x = 976,541,375.30/30,603.90
  6. Step 6: Final answer
    x = 31,909.05

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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.