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Finding the Fourth Proportional to 6,989.40, 10,492.20 and 4,030.20

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Solution

The fourth proportional to 6,989.40, 10,492.20 and 4,030.20 is: 6,049.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,989.40 : 10,492.20 = 4,030.20 : x
  2. Step 2: Convert to fraction form
    6,989.40/10,492.20 = 4,030.20/x
  3. Step 3: Cross multiply
    6,989.40x = 10,492.20 × 4,030.20
  4. Step 4: Simplify right side
    6,989.40x = 42,285,664.44
  5. Step 5: Solve for x
    x = 42,285,664.44/6,989.40
  6. Step 6: Final answer
    x = 6,049.97

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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.