Home / 20,915.81-31,371.42-6,124.87

Finding the Fourth Proportional to 20,915.81, 31,371.42 and 6,124.87

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Solution

The fourth proportional to 20,915.81, 31,371.42 and 6,124.87 is: 9,186.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,915.81 : 31,371.42 = 6,124.87 : x
  2. Step 2: Convert to fraction form
    20,915.81/31,371.42 = 6,124.87/x
  3. Step 3: Cross multiply
    20,915.81x = 31,371.42 × 6,124.87
  4. Step 4: Simplify right side
    20,915.81x = 192,145,869.22
  5. Step 5: Solve for x
    x = 192,145,869.22/20,915.81
  6. Step 6: Final answer
    x = 9,186.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.