Home / 12,138.84-18,208.71-4,347.64

Finding the Fourth Proportional to 12,138.84, 18,208.71 and 4,347.64

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Solution

The fourth proportional to 12,138.84, 18,208.71 and 4,347.64 is: 6,521.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,138.84 : 18,208.71 = 4,347.64 : x
  2. Step 2: Convert to fraction form
    12,138.84/18,208.71 = 4,347.64/x
  3. Step 3: Cross multiply
    12,138.84x = 18,208.71 × 4,347.64
  4. Step 4: Simplify right side
    12,138.84x = 79,164,915.94
  5. Step 5: Solve for x
    x = 79,164,915.94/12,138.84
  6. Step 6: Final answer
    x = 6,521.62

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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.