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Finding the Fourth Proportional to 15,746.08, 21,728.64 and 8,672.08

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Solution

The fourth proportional to 15,746.08, 21,728.64 and 8,672.08 is: 11,966.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,746.08 : 21,728.64 = 8,672.08 : x
  2. Step 2: Convert to fraction form
    15,746.08/21,728.64 = 8,672.08/x
  3. Step 3: Cross multiply
    15,746.08x = 21,728.64 × 8,672.08
  4. Step 4: Simplify right side
    15,746.08x = 188,432,504.37
  5. Step 5: Solve for x
    x = 188,432,504.37/15,746.08
  6. Step 6: Final answer
    x = 11,966.95

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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.