Home / 30,965.04-42,749.46-20,385.43

Finding the Fourth Proportional to 30,965.04, 42,749.46 and 20,385.43

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Solution

The fourth proportional to 30,965.04, 42,749.46 and 20,385.43 is: 28,143.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,965.04 : 42,749.46 = 20,385.43 : x
  2. Step 2: Convert to fraction form
    30,965.04/42,749.46 = 20,385.43/x
  3. Step 3: Cross multiply
    30,965.04x = 42,749.46 × 20,385.43
  4. Step 4: Simplify right side
    30,965.04x = 871,466,017.49
  5. Step 5: Solve for x
    x = 871,466,017.49/30,965.04
  6. Step 6: Final answer
    x = 28,143.55

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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.