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Finding the Fourth Proportional to 8,999.96, 12,420.34 and 5,021.08

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Solution

The fourth proportional to 8,999.96, 12,420.34 and 5,021.08 is: 6,929.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,999.96 : 12,420.34 = 5,021.08 : x
  2. Step 2: Convert to fraction form
    8,999.96/12,420.34 = 5,021.08/x
  3. Step 3: Cross multiply
    8,999.96x = 12,420.34 × 5,021.08
  4. Step 4: Simplify right side
    8,999.96x = 62,363,520.77
  5. Step 5: Solve for x
    x = 62,363,520.77/8,999.96
  6. Step 6: Final answer
    x = 6,929.31

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1.5x scale

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.