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Finding the Fourth Proportional to 8,750.84, 12,078.18 and 5,767.20

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Solution

The fourth proportional to 8,750.84, 12,078.18 and 5,767.20 is: 7,960.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,750.84 : 12,078.18 = 5,767.20 : x
  2. Step 2: Convert to fraction form
    8,750.84/12,078.18 = 5,767.20/x
  3. Step 3: Cross multiply
    8,750.84x = 12,078.18 × 5,767.20
  4. Step 4: Simplify right side
    8,750.84x = 69,657,279.70
  5. Step 5: Solve for x
    x = 69,657,279.70/8,750.84
  6. Step 6: Final answer
    x = 7,960.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.