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Finding the Fourth Proportional to 30,679.63, 45,981.78 and 15,880.12

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Solution

The fourth proportional to 30,679.63, 45,981.78 and 15,880.12 is: 23,800.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,679.63 : 45,981.78 = 15,880.12 : x
  2. Step 2: Convert to fraction form
    30,679.63/45,981.78 = 15,880.12/x
  3. Step 3: Cross multiply
    30,679.63x = 45,981.78 × 15,880.12
  4. Step 4: Simplify right side
    30,679.63x = 730,196,184.21
  5. Step 5: Solve for x
    x = 730,196,184.21/30,679.63
  6. Step 6: Final answer
    x = 23,800.68

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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.