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Finding the Fourth Proportional to 12,320.64, 18,475.84 and 4,928.64

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Solution

The fourth proportional to 12,320.64, 18,475.84 and 4,928.64 is: 7,390.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,320.64 : 18,475.84 = 4,928.64 : x
  2. Step 2: Convert to fraction form
    12,320.64/18,475.84 = 4,928.64/x
  3. Step 3: Cross multiply
    12,320.64x = 18,475.84 × 4,928.64
  4. Step 4: Simplify right side
    12,320.64x = 91,060,764.06
  5. Step 5: Solve for x
    x = 91,060,764.06/12,320.64
  6. Step 6: Final answer
    x = 7,390.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.