Home / 39,771.16-54,885.72-21,867.64

Finding the Fourth Proportional to 39,771.16, 54,885.72 and 21,867.64

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Solution

The fourth proportional to 39,771.16, 54,885.72 and 21,867.64 is: 30,178.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,771.16 : 54,885.72 = 21,867.64 : x
  2. Step 2: Convert to fraction form
    39,771.16/54,885.72 = 21,867.64/x
  3. Step 3: Cross multiply
    39,771.16x = 54,885.72 × 21,867.64
  4. Step 4: Simplify right side
    39,771.16x = 1,200,221,166.10
  5. Step 5: Solve for x
    x = 1,200,221,166.10/39,771.16
  6. Step 6: Final answer
    x = 30,178.18

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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.