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Finding the Fourth Proportional to 15,985.48, 23,991.06 and 7,221.16

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Solution

The fourth proportional to 15,985.48, 23,991.06 and 7,221.16 is: 10,837.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,985.48 : 23,991.06 = 7,221.16 : x
  2. Step 2: Convert to fraction form
    15,985.48/23,991.06 = 7,221.16/x
  3. Step 3: Cross multiply
    15,985.48x = 23,991.06 × 7,221.16
  4. Step 4: Simplify right side
    15,985.48x = 173,243,282.83
  5. Step 5: Solve for x
    x = 173,243,282.83/15,985.48
  6. Step 6: Final answer
    x = 10,837.54

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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.