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Finding the Fourth Proportional to 13,777.76, 19,019.84 and 8,812.64

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Solution

The fourth proportional to 13,777.76, 19,019.84 and 8,812.64 is: 12,165.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,777.76 : 19,019.84 = 8,812.64 : x
  2. Step 2: Convert to fraction form
    13,777.76/19,019.84 = 8,812.64/x
  3. Step 3: Cross multiply
    13,777.76x = 19,019.84 × 8,812.64
  4. Step 4: Simplify right side
    13,777.76x = 167,615,002.78
  5. Step 5: Solve for x
    x = 167,615,002.78/13,777.76
  6. Step 6: Final answer
    x = 12,165.62

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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.