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Finding the Fourth Proportional to 8,612.84, 12,919.23 and 5,690.45

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Solution

The fourth proportional to 8,612.84, 12,919.23 and 5,690.45 is: 8,535.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,612.84 : 12,919.23 = 5,690.45 : x
  2. Step 2: Convert to fraction form
    8,612.84/12,919.23 = 5,690.45/x
  3. Step 3: Cross multiply
    8,612.84x = 12,919.23 × 5,690.45
  4. Step 4: Simplify right side
    8,612.84x = 73,516,167.76
  5. Step 5: Solve for x
    x = 73,516,167.76/8,612.84
  6. Step 6: Final answer
    x = 8,535.65

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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.