Home / 21,099.69-29,122.34-12,148.79

Finding the Fourth Proportional to 21,099.69, 29,122.34 and 12,148.79

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Solution

The fourth proportional to 21,099.69, 29,122.34 and 12,148.79 is: 16,768.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,099.69 : 29,122.34 = 12,148.79 : x
  2. Step 2: Convert to fraction form
    21,099.69/29,122.34 = 12,148.79/x
  3. Step 3: Cross multiply
    21,099.69x = 29,122.34 × 12,148.79
  4. Step 4: Simplify right side
    21,099.69x = 353,800,986.61
  5. Step 5: Solve for x
    x = 353,800,986.61/21,099.69
  6. Step 6: Final answer
    x = 16,768.07

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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.