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Finding the Fourth Proportional to 15,638.94, 21,579.69 and 8,924.16

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Solution

The fourth proportional to 15,638.94, 21,579.69 and 8,924.16 is: 12,314.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,638.94 : 21,579.69 = 8,924.16 : x
  2. Step 2: Convert to fraction form
    15,638.94/21,579.69 = 8,924.16/x
  3. Step 3: Cross multiply
    15,638.94x = 21,579.69 × 8,924.16
  4. Step 4: Simplify right side
    15,638.94x = 192,580,606.31
  5. Step 5: Solve for x
    x = 192,580,606.31/15,638.94
  6. Step 6: Final answer
    x = 12,314.17

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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.