Home / 53,787.21-80,655.75-20,486.49

Finding the Fourth Proportional to 53,787.21, 80,655.75 and 20,486.49

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Solution

The fourth proportional to 53,787.21, 80,655.75 and 20,486.49 is: 30,720.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,787.21 : 80,655.75 = 20,486.49 : x
  2. Step 2: Convert to fraction form
    53,787.21/80,655.75 = 20,486.49/x
  3. Step 3: Cross multiply
    53,787.21x = 80,655.75 × 20,486.49
  4. Step 4: Simplify right side
    53,787.21x = 1,652,353,215.82
  5. Step 5: Solve for x
    x = 1,652,353,215.82/53,787.21
  6. Step 6: Final answer
    x = 30,720.19

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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.