Home / 30,907.93-42,640.87-20,165.44

Finding the Fourth Proportional to 30,907.93, 42,640.87 and 20,165.44

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Solution

The fourth proportional to 30,907.93, 42,640.87 and 20,165.44 is: 27,820.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,907.93 : 42,640.87 = 20,165.44 : x
  2. Step 2: Convert to fraction form
    30,907.93/42,640.87 = 20,165.44/x
  3. Step 3: Cross multiply
    30,907.93x = 42,640.87 × 20,165.44
  4. Step 4: Simplify right side
    30,907.93x = 859,871,905.53
  5. Step 5: Solve for x
    x = 859,871,905.53/30,907.93
  6. Step 6: Final answer
    x = 27,820.43

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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.