Home / 21,014.12-28,999.14-11,583.56

Finding the Fourth Proportional to 21,014.12, 28,999.14 and 11,583.56

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Solution

The fourth proportional to 21,014.12, 28,999.14 and 11,583.56 is: 15,985.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,014.12 : 28,999.14 = 11,583.56 : x
  2. Step 2: Convert to fraction form
    21,014.12/28,999.14 = 11,583.56/x
  3. Step 3: Cross multiply
    21,014.12x = 28,999.14 × 11,583.56
  4. Step 4: Simplify right side
    21,014.12x = 335,913,278.14
  5. Step 5: Solve for x
    x = 335,913,278.14/21,014.12
  6. Step 6: Final answer
    x = 15,985.12

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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.