Home / 21,003.60-28,985.08-11,572.72

Finding the Fourth Proportional to 21,003.60, 28,985.08 and 11,572.72

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Solution

The fourth proportional to 21,003.60, 28,985.08 and 11,572.72 is: 15,970.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,003.60 : 28,985.08 = 11,572.72 : x
  2. Step 2: Convert to fraction form
    21,003.60/28,985.08 = 11,572.72/x
  3. Step 3: Cross multiply
    21,003.60x = 28,985.08 × 11,572.72
  4. Step 4: Simplify right side
    21,003.60x = 335,436,215.02
  5. Step 5: Solve for x
    x = 335,436,215.02/21,003.60
  6. Step 6: Final answer
    x = 15,970.42

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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.