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Finding the Fourth Proportional to 8,315.36, 12,480.34 and 7,017.74

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Solution

The fourth proportional to 8,315.36, 12,480.34 and 7,017.74 is: 10,532.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,315.36 : 12,480.34 = 7,017.74 : x
  2. Step 2: Convert to fraction form
    8,315.36/12,480.34 = 7,017.74/x
  3. Step 3: Cross multiply
    8,315.36x = 12,480.34 × 7,017.74
  4. Step 4: Simplify right side
    8,315.36x = 87,583,781.23
  5. Step 5: Solve for x
    x = 87,583,781.23/8,315.36
  6. Step 6: Final answer
    x = 10,532.77

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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.