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Finding the Fourth Proportional to 8,707.76, 12,018.56 and 5,563.40

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Solution

The fourth proportional to 8,707.76, 12,018.56 and 5,563.40 is: 7,678.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,707.76 : 12,018.56 = 5,563.40 : x
  2. Step 2: Convert to fraction form
    8,707.76/12,018.56 = 5,563.40/x
  3. Step 3: Cross multiply
    8,707.76x = 12,018.56 × 5,563.40
  4. Step 4: Simplify right side
    8,707.76x = 66,864,056.70
  5. Step 5: Solve for x
    x = 66,864,056.70/8,707.76
  6. Step 6: Final answer
    x = 7,678.67

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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.