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Finding the Fourth Proportional to 15,371.88, 21,211.50 and 8,657.34

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Solution

The fourth proportional to 15,371.88, 21,211.50 and 8,657.34 is: 11,946.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,371.88 : 21,211.50 = 8,657.34 : x
  2. Step 2: Convert to fraction form
    15,371.88/21,211.50 = 8,657.34/x
  3. Step 3: Cross multiply
    15,371.88x = 21,211.50 × 8,657.34
  4. Step 4: Simplify right side
    15,371.88x = 183,635,167.41
  5. Step 5: Solve for x
    x = 183,635,167.41/15,371.88
  6. Step 6: Final answer
    x = 11,946.17

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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.