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Finding the Fourth Proportional to 30,255.80, 45,384.98 and 9,479.48

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Solution

The fourth proportional to 30,255.80, 45,384.98 and 9,479.48 is: 14,219.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,255.80 : 45,384.98 = 9,479.48 : x
  2. Step 2: Convert to fraction form
    30,255.80/45,384.98 = 9,479.48/x
  3. Step 3: Cross multiply
    30,255.80x = 45,384.98 × 9,479.48
  4. Step 4: Simplify right side
    30,255.80x = 430,226,010.21
  5. Step 5: Solve for x
    x = 430,226,010.21/30,255.80
  6. Step 6: Final answer
    x = 14,219.62

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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.