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Finding the Fourth Proportional to 8,777.64, 12,114.54 and 5,243.16

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Solution

The fourth proportional to 8,777.64, 12,114.54 and 5,243.16 is: 7,236.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,777.64 : 12,114.54 = 5,243.16 : x
  2. Step 2: Convert to fraction form
    8,777.64/12,114.54 = 5,243.16/x
  3. Step 3: Cross multiply
    8,777.64x = 12,114.54 × 5,243.16
  4. Step 4: Simplify right side
    8,777.64x = 63,518,471.55
  5. Step 5: Solve for x
    x = 63,518,471.55/8,777.64
  6. Step 6: Final answer
    x = 7,236.40

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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.