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Finding the Fourth Proportional to 32,490.80, 48,707.40 and 19,329.20

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Solution

The fourth proportional to 32,490.80, 48,707.40 and 19,329.20 is: 28,976.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    32,490.80 : 48,707.40 = 19,329.20 : x
  2. Step 2: Convert to fraction form
    32,490.80/48,707.40 = 19,329.20/x
  3. Step 3: Cross multiply
    32,490.80x = 48,707.40 × 19,329.20
  4. Step 4: Simplify right side
    32,490.80x = 941,475,076.08
  5. Step 5: Solve for x
    x = 941,475,076.08/32,490.80
  6. Step 6: Final answer
    x = 28,976.67

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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.