Home / 21,003.63-28,985-11,572.39

Finding the Fourth Proportional to 21,003.63, 28,985 and 11,572.39

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Solution

The fourth proportional to 21,003.63, 28,985 and 11,572.39 is: 15,969.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,003.63 : 28,985 = 11,572.39 : x
  2. Step 2: Convert to fraction form
    21,003.63/28,985 = 11,572.39/x
  3. Step 3: Cross multiply
    21,003.63x = 28,985 × 11,572.39
  4. Step 4: Simplify right side
    21,003.63x = 335,425,724.15
  5. Step 5: Solve for x
    x = 335,425,724.15/21,003.63
  6. Step 6: Final answer
    x = 15,969.89

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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.