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Finding the Fourth Proportional to 6,690.40, 10,045.20 and 5,058.40

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Solution

The fourth proportional to 6,690.40, 10,045.20 and 5,058.40 is: 7,594.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,690.40 : 10,045.20 = 5,058.40 : x
  2. Step 2: Convert to fraction form
    6,690.40/10,045.20 = 5,058.40/x
  3. Step 3: Cross multiply
    6,690.40x = 10,045.20 × 5,058.40
  4. Step 4: Simplify right side
    6,690.40x = 50,812,639.68
  5. Step 5: Solve for x
    x = 50,812,639.68/6,690.40
  6. Step 6: Final answer
    x = 7,594.86

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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.