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Finding the Fourth Proportional to 30,007.80, 45,000.90 and 15,211.80

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Solution

The fourth proportional to 30,007.80, 45,000.90 and 15,211.80 is: 22,812.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,007.80 : 45,000.90 = 15,211.80 : x
  2. Step 2: Convert to fraction form
    30,007.80/45,000.90 = 15,211.80/x
  3. Step 3: Cross multiply
    30,007.80x = 45,000.90 × 15,211.80
  4. Step 4: Simplify right side
    30,007.80x = 684,544,690.62
  5. Step 5: Solve for x
    x = 684,544,690.62/30,007.80
  6. Step 6: Final answer
    x = 22,812.23

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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.