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Finding the Fourth Proportional to 9,999.99, 14,997.15 and 4,155.21

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Solution

The fourth proportional to 9,999.99, 14,997.15 and 4,155.21 is: 6,231.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,999.99 : 14,997.15 = 4,155.21 : x
  2. Step 2: Convert to fraction form
    9,999.99/14,997.15 = 4,155.21/x
  3. Step 3: Cross multiply
    9,999.99x = 14,997.15 × 4,155.21
  4. Step 4: Simplify right side
    9,999.99x = 62,316,307.65
  5. Step 5: Solve for x
    x = 62,316,307.65/9,999.99
  6. Step 6: Final answer
    x = 6,231.64

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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.