Home / 21,047.55-31,533.01-12,255.81

Finding the Fourth Proportional to 21,047.55, 31,533.01 and 12,255.81

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Solution

The fourth proportional to 21,047.55, 31,533.01 and 12,255.81 is: 18,361.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,047.55 : 31,533.01 = 12,255.81 : x
  2. Step 2: Convert to fraction form
    21,047.55/31,533.01 = 12,255.81/x
  3. Step 3: Cross multiply
    21,047.55x = 31,533.01 × 12,255.81
  4. Step 4: Simplify right side
    21,047.55x = 386,462,579.29
  5. Step 5: Solve for x
    x = 386,462,579.29/21,047.55
  6. Step 6: Final answer
    x = 18,361.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.