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Finding the Fourth Proportional to 8,430.78, 12,648.64 and 4,051.92

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Solution

The fourth proportional to 8,430.78, 12,648.64 and 4,051.92 is: 6,079.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,430.78 : 12,648.64 = 4,051.92 : x
  2. Step 2: Convert to fraction form
    8,430.78/12,648.64 = 4,051.92/x
  3. Step 3: Cross multiply
    8,430.78x = 12,648.64 × 4,051.92
  4. Step 4: Simplify right side
    8,430.78x = 51,251,277.39
  5. Step 5: Solve for x
    x = 51,251,277.39/8,430.78
  6. Step 6: Final answer
    x = 6,079.07

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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.