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Finding the Fourth Proportional to 8,690.70, 13,040.10 and 4,535.40

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Solution

The fourth proportional to 8,690.70, 13,040.10 and 4,535.40 is: 6,805.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,690.70 : 13,040.10 = 4,535.40 : x
  2. Step 2: Convert to fraction form
    8,690.70/13,040.10 = 4,535.40/x
  3. Step 3: Cross multiply
    8,690.70x = 13,040.10 × 4,535.40
  4. Step 4: Simplify right side
    8,690.70x = 59,142,069.54
  5. Step 5: Solve for x
    x = 59,142,069.54/8,690.70
  6. Step 6: Final answer
    x = 6,805.21

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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.