Home / 21,003.84-28,985.40-11,572.38

Finding the Fourth Proportional to 21,003.84, 28,985.40 and 11,572.38

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Solution

The fourth proportional to 21,003.84, 28,985.40 and 11,572.38 is: 15,969.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,003.84 : 28,985.40 = 11,572.38 : x
  2. Step 2: Convert to fraction form
    21,003.84/28,985.40 = 11,572.38/x
  3. Step 3: Cross multiply
    21,003.84x = 28,985.40 × 11,572.38
  4. Step 4: Simplify right side
    21,003.84x = 335,430,063.25
  5. Step 5: Solve for x
    x = 335,430,063.25/21,003.84
  6. Step 6: Final answer
    x = 15,969.94

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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.