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Finding the Fourth Proportional to 30,705.90, 45,976.80 and 19,552.20

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Solution

The fourth proportional to 30,705.90, 45,976.80 and 19,552.20 is: 29,276.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,705.90 : 45,976.80 = 19,552.20 : x
  2. Step 2: Convert to fraction form
    30,705.90/45,976.80 = 19,552.20/x
  3. Step 3: Cross multiply
    30,705.90x = 45,976.80 × 19,552.20
  4. Step 4: Simplify right side
    30,705.90x = 898,947,588.96
  5. Step 5: Solve for x
    x = 898,947,588.96/30,705.90
  6. Step 6: Final answer
    x = 29,276.05

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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.