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Finding the Fourth Proportional to 8,629,640.64, 11,908,684.56 and 4,762,111.20

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Solution

The fourth proportional to 8,629,640.64, 11,908,684.56 and 4,762,111.20 is: 6,571,592.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,629,640.64 : 11,908,684.56 = 4,762,111.20 : x
  2. Step 2: Convert to fraction form
    8,629,640.64/11,908,684.56 = 4,762,111.20/x
  3. Step 3: Cross multiply
    8,629,640.64x = 11,908,684.56 × 4,762,111.20
  4. Step 4: Simplify right side
    8,629,640.64x = 56,710,480,120,443.08
  5. Step 5: Solve for x
    x = 56,710,480,120,443.08/8,629,640.64
  6. Step 6: Final answer
    x = 6,571,592.32

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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.