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Finding the Fourth Proportional to 12,014.70, 18,017.28 and 4,990.02

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Solution

The fourth proportional to 12,014.70, 18,017.28 and 4,990.02 is: 7,483.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,014.70 : 18,017.28 = 4,990.02 : x
  2. Step 2: Convert to fraction form
    12,014.70/18,017.28 = 4,990.02/x
  3. Step 3: Cross multiply
    12,014.70x = 18,017.28 × 4,990.02
  4. Step 4: Simplify right side
    12,014.70x = 89,906,587.55
  5. Step 5: Solve for x
    x = 89,906,587.55/12,014.70
  6. Step 6: Final answer
    x = 7,483.05

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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.