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Finding the Fourth Proportional to 15,617.64, 21,544.72 and 10,641

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Solution

The fourth proportional to 15,617.64, 21,544.72 and 10,641 is: 14,679.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,617.64 : 21,544.72 = 10,641 : x
  2. Step 2: Convert to fraction form
    15,617.64/21,544.72 = 10,641/x
  3. Step 3: Cross multiply
    15,617.64x = 21,544.72 × 10,641
  4. Step 4: Simplify right side
    15,617.64x = 229,257,365.52
  5. Step 5: Solve for x
    x = 229,257,365.52/15,617.64
  6. Step 6: Final answer
    x = 14,679.39

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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.