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Finding the Fourth Proportional to 30,168.60, 45,252.90 and 12,658.20

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Solution

The fourth proportional to 30,168.60, 45,252.90 and 12,658.20 is: 18,987.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,168.60 : 45,252.90 = 12,658.20 : x
  2. Step 2: Convert to fraction form
    30,168.60/45,252.90 = 12,658.20/x
  3. Step 3: Cross multiply
    30,168.60x = 45,252.90 × 12,658.20
  4. Step 4: Simplify right side
    30,168.60x = 572,820,258.78
  5. Step 5: Solve for x
    x = 572,820,258.78/30,168.60
  6. Step 6: Final answer
    x = 18,987.30

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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.