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Finding the Fourth Proportional to 8,775.84, 12,111 and 4,999.62

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Solution

The fourth proportional to 8,775.84, 12,111 and 4,999.62 is: 6,899.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,775.84 : 12,111 = 4,999.62 : x
  2. Step 2: Convert to fraction form
    8,775.84/12,111 = 4,999.62/x
  3. Step 3: Cross multiply
    8,775.84x = 12,111 × 4,999.62
  4. Step 4: Simplify right side
    8,775.84x = 60,550,397.82
  5. Step 5: Solve for x
    x = 60,550,397.82/8,775.84
  6. Step 6: Final answer
    x = 6,899.67

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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.