Home / 21,211.56-29,276.30-12,257.87

Finding the Fourth Proportional to 21,211.56, 29,276.30 and 12,257.87

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Solution

The fourth proportional to 21,211.56, 29,276.30 and 12,257.87 is: 16,918.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,211.56 : 29,276.30 = 12,257.87 : x
  2. Step 2: Convert to fraction form
    21,211.56/29,276.30 = 12,257.87/x
  3. Step 3: Cross multiply
    21,211.56x = 29,276.30 × 12,257.87
  4. Step 4: Simplify right side
    21,211.56x = 358,865,091.38
  5. Step 5: Solve for x
    x = 358,865,091.38/21,211.56
  6. Step 6: Final answer
    x = 16,918.37

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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.