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Finding the Fourth Proportional to 13,585.42, 18,750.99 and 7,999.66

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Solution

The fourth proportional to 13,585.42, 18,750.99 and 7,999.66 is: 11,041.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,585.42 : 18,750.99 = 7,999.66 : x
  2. Step 2: Convert to fraction form
    13,585.42/18,750.99 = 7,999.66/x
  3. Step 3: Cross multiply
    13,585.42x = 18,750.99 × 7,999.66
  4. Step 4: Simplify right side
    13,585.42x = 150,001,544.66
  5. Step 5: Solve for x
    x = 150,001,544.66/13,585.42
  6. Step 6: Final answer
    x = 11,041.36

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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.