Home / 2,421.72-3,331.80-2,136.76

Finding the Fourth Proportional to 2,421.72, 3,331.80 and 2,136.76

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Solution

The fourth proportional to 2,421.72, 3,331.80 and 2,136.76 is: 2,939.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,421.72 : 3,331.80 = 2,136.76 : x
  2. Step 2: Convert to fraction form
    2,421.72/3,331.80 = 2,136.76/x
  3. Step 3: Cross multiply
    2,421.72x = 3,331.80 × 2,136.76
  4. Step 4: Simplify right side
    2,421.72x = 7,119,256.97
  5. Step 5: Solve for x
    x = 7,119,256.97/2,421.72
  6. Step 6: Final answer
    x = 2,939.75

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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.