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Finding the Fourth Proportional to 30,290.69, 45,442.19 and 12,522.94

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Solution

The fourth proportional to 30,290.69, 45,442.19 and 12,522.94 is: 18,786.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,290.69 : 45,442.19 = 12,522.94 : x
  2. Step 2: Convert to fraction form
    30,290.69/45,442.19 = 12,522.94/x
  3. Step 3: Cross multiply
    30,290.69x = 45,442.19 × 12,522.94
  4. Step 4: Simplify right side
    30,290.69x = 569,069,818.84
  5. Step 5: Solve for x
    x = 569,069,818.84/30,290.69
  6. Step 6: Final answer
    x = 18,786.95

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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.