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Finding the Fourth Proportional to 15,255.74, 21,051.14 and 8,541.74

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Solution

The fourth proportional to 15,255.74, 21,051.14 and 8,541.74 is: 11,786.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,255.74 : 21,051.14 = 8,541.74 : x
  2. Step 2: Convert to fraction form
    15,255.74/21,051.14 = 8,541.74/x
  3. Step 3: Cross multiply
    15,255.74x = 21,051.14 × 8,541.74
  4. Step 4: Simplify right side
    15,255.74x = 179,813,364.58
  5. Step 5: Solve for x
    x = 179,813,364.58/15,255.74
  6. Step 6: Final answer
    x = 11,786.60

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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.