Home / 2,931.50-4,045.49-2,186.12

Finding the Fourth Proportional to 2,931.50, 4,045.49 and 2,186.12

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Solution

The fourth proportional to 2,931.50, 4,045.49 and 2,186.12 is: 3,016.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,931.50 : 4,045.49 = 2,186.12 : x
  2. Step 2: Convert to fraction form
    2,931.50/4,045.49 = 2,186.12/x
  3. Step 3: Cross multiply
    2,931.50x = 4,045.49 × 2,186.12
  4. Step 4: Simplify right side
    2,931.50x = 8,843,915.67
  5. Step 5: Solve for x
    x = 8,843,915.67/2,931.50
  6. Step 6: Final answer
    x = 3,016.86

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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.