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Finding the Fourth Proportional to 8,460.80, 12,690.93 and 4,021.66

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Solution

The fourth proportional to 8,460.80, 12,690.93 and 4,021.66 is: 6,032.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,460.80 : 12,690.93 = 4,021.66 : x
  2. Step 2: Convert to fraction form
    8,460.80/12,690.93 = 4,021.66/x
  3. Step 3: Cross multiply
    8,460.80x = 12,690.93 × 4,021.66
  4. Step 4: Simplify right side
    8,460.80x = 51,038,573.82
  5. Step 5: Solve for x
    x = 51,038,573.82/8,460.80
  6. Step 6: Final answer
    x = 6,032.36

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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.