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Finding the Fourth Proportional to 15,752.34, 21,738.06 and 8,679.06

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Solution

The fourth proportional to 15,752.34, 21,738.06 and 8,679.06 is: 11,977.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,752.34 : 21,738.06 = 8,679.06 : x
  2. Step 2: Convert to fraction form
    15,752.34/21,738.06 = 8,679.06/x
  3. Step 3: Cross multiply
    15,752.34x = 21,738.06 × 8,679.06
  4. Step 4: Simplify right side
    15,752.34x = 188,665,927.02
  5. Step 5: Solve for x
    x = 188,665,927.02/15,752.34
  6. Step 6: Final answer
    x = 11,977.01

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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.