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Finding the Fourth Proportional to 6,690.70, 10,038.63 and 2,990.32

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Solution

The fourth proportional to 6,690.70, 10,038.63 and 2,990.32 is: 4,486.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,690.70 : 10,038.63 = 2,990.32 : x
  2. Step 2: Convert to fraction form
    6,690.70/10,038.63 = 2,990.32/x
  3. Step 3: Cross multiply
    6,690.70x = 10,038.63 × 2,990.32
  4. Step 4: Simplify right side
    6,690.70x = 30,018,702.18
  5. Step 5: Solve for x
    x = 30,018,702.18/6,690.70
  6. Step 6: Final answer
    x = 4,486.63

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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.