Home / 21,809.64-30,114.05-15,855.54

Finding the Fourth Proportional to 21,809.64, 30,114.05 and 15,855.54

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Solution

The fourth proportional to 21,809.64, 30,114.05 and 15,855.54 is: 21,892.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,809.64 : 30,114.05 = 15,855.54 : x
  2. Step 2: Convert to fraction form
    21,809.64/30,114.05 = 15,855.54/x
  3. Step 3: Cross multiply
    21,809.64x = 30,114.05 × 15,855.54
  4. Step 4: Simplify right side
    21,809.64x = 477,474,445.06
  5. Step 5: Solve for x
    x = 477,474,445.06/21,809.64
  6. Step 6: Final answer
    x = 21,892.82

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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.