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Finding the Fourth Proportional to 8,070.63, 12,128.63 and 4,784.19

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Solution

The fourth proportional to 8,070.63, 12,128.63 and 4,784.19 is: 7,189.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,070.63 : 12,128.63 = 4,784.19 : x
  2. Step 2: Convert to fraction form
    8,070.63/12,128.63 = 4,784.19/x
  3. Step 3: Cross multiply
    8,070.63x = 12,128.63 × 4,784.19
  4. Step 4: Simplify right side
    8,070.63x = 58,025,646.44
  5. Step 5: Solve for x
    x = 58,025,646.44/8,070.63
  6. Step 6: Final answer
    x = 7,189.73

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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.