Home / 31,461.04-43,401.72-20,286.64

Finding the Fourth Proportional to 31,461.04, 43,401.72 and 20,286.64

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Solution

The fourth proportional to 31,461.04, 43,401.72 and 20,286.64 is: 27,986.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,461.04 : 43,401.72 = 20,286.64 : x
  2. Step 2: Convert to fraction form
    31,461.04/43,401.72 = 20,286.64/x
  3. Step 3: Cross multiply
    31,461.04x = 43,401.72 × 20,286.64
  4. Step 4: Simplify right side
    31,461.04x = 880,475,069.02
  5. Step 5: Solve for x
    x = 880,475,069.02/31,461.04
  6. Step 6: Final answer
    x = 27,986.20

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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.