Home / 11,139.84-15,371.88-6,423.24

Finding the Fourth Proportional to 11,139.84, 15,371.88 and 6,423.24

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Solution

The fourth proportional to 11,139.84, 15,371.88 and 6,423.24 is: 8,863.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,139.84 : 15,371.88 = 6,423.24 : x
  2. Step 2: Convert to fraction form
    11,139.84/15,371.88 = 6,423.24/x
  3. Step 3: Cross multiply
    11,139.84x = 15,371.88 × 6,423.24
  4. Step 4: Simplify right side
    11,139.84x = 98,737,274.49
  5. Step 5: Solve for x
    x = 98,737,274.49/11,139.84
  6. Step 6: Final answer
    x = 8,863.44

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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.