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Finding the Fourth Proportional to 21,586.48, 29,783.48 and 12,636.18

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Solution

The fourth proportional to 21,586.48, 29,783.48 and 12,636.18 is: 17,434.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,586.48 : 29,783.48 = 12,636.18 : x
  2. Step 2: Convert to fraction form
    21,586.48/29,783.48 = 12,636.18/x
  3. Step 3: Cross multiply
    21,586.48x = 29,783.48 × 12,636.18
  4. Step 4: Simplify right side
    21,586.48x = 376,349,414.31
  5. Step 5: Solve for x
    x = 376,349,414.31/21,586.48
  6. Step 6: Final answer
    x = 17,434.50

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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.