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Finding the Fourth Proportional to 30,193.20, 45,246.60 and 20,948.40

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Solution

The fourth proportional to 30,193.20, 45,246.60 and 20,948.40 is: 31,392.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,193.20 : 45,246.60 = 20,948.40 : x
  2. Step 2: Convert to fraction form
    30,193.20/45,246.60 = 20,948.40/x
  3. Step 3: Cross multiply
    30,193.20x = 45,246.60 × 20,948.40
  4. Step 4: Simplify right side
    30,193.20x = 947,843,875.44
  5. Step 5: Solve for x
    x = 947,843,875.44/30,193.20
  6. Step 6: Final answer
    x = 31,392.63

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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.