Home / 21,309.05-29,459.63-15,994.64

Finding the Fourth Proportional to 21,309.05, 29,459.63 and 15,994.64

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Solution

The fourth proportional to 21,309.05, 29,459.63 and 15,994.64 is: 22,112.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,309.05 : 29,459.63 = 15,994.64 : x
  2. Step 2: Convert to fraction form
    21,309.05/29,459.63 = 15,994.64/x
  3. Step 3: Cross multiply
    21,309.05x = 29,459.63 × 15,994.64
  4. Step 4: Simplify right side
    21,309.05x = 471,195,949.11
  5. Step 5: Solve for x
    x = 471,195,949.11/21,309.05
  6. Step 6: Final answer
    x = 22,112.49

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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.