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Finding the Fourth Proportional to 15,366.78, 21,206.16 and 8,652.42

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Solution

The fourth proportional to 15,366.78, 21,206.16 and 8,652.42 is: 11,940.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,366.78 : 21,206.16 = 8,652.42 : x
  2. Step 2: Convert to fraction form
    15,366.78/21,206.16 = 8,652.42/x
  3. Step 3: Cross multiply
    15,366.78x = 21,206.16 × 8,652.42
  4. Step 4: Simplify right side
    15,366.78x = 183,484,602.91
  5. Step 5: Solve for x
    x = 183,484,602.91/15,366.78
  6. Step 6: Final answer
    x = 11,940.34

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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.