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Finding the Fourth Proportional to 14,999.40, 20,699.19 and 8,285.40

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Solution

The fourth proportional to 14,999.40, 20,699.19 and 8,285.40 is: 11,433.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,999.40 : 20,699.19 = 8,285.40 : x
  2. Step 2: Convert to fraction form
    14,999.40/20,699.19 = 8,285.40/x
  3. Step 3: Cross multiply
    14,999.40x = 20,699.19 × 8,285.40
  4. Step 4: Simplify right side
    14,999.40x = 171,501,068.83
  5. Step 5: Solve for x
    x = 171,501,068.83/14,999.40
  6. Step 6: Final answer
    x = 11,433.86

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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.