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Finding the Fourth Proportional to 15,371.63, 21,211.08 and 8,657.07

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Solution

The fourth proportional to 15,371.63, 21,211.08 and 8,657.07 is: 11,945.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,371.63 : 21,211.08 = 8,657.07 : x
  2. Step 2: Convert to fraction form
    15,371.63/21,211.08 = 8,657.07/x
  3. Step 3: Cross multiply
    15,371.63x = 21,211.08 × 8,657.07
  4. Step 4: Simplify right side
    15,371.63x = 183,625,804.34
  5. Step 5: Solve for x
    x = 183,625,804.34/15,371.63
  6. Step 6: Final answer
    x = 11,945.76

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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.