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Finding the Fourth Proportional to 15,908.52, 21,955.86 and 9,619.68

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Solution

The fourth proportional to 15,908.52, 21,955.86 and 9,619.68 is: 13,276.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,908.52 : 21,955.86 = 9,619.68 : x
  2. Step 2: Convert to fraction form
    15,908.52/21,955.86 = 9,619.68/x
  3. Step 3: Cross multiply
    15,908.52x = 21,955.86 × 9,619.68
  4. Step 4: Simplify right side
    15,908.52x = 211,208,347.32
  5. Step 5: Solve for x
    x = 211,208,347.32/15,908.52
  6. Step 6: Final answer
    x = 13,276.43

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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.