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Finding the Fourth Proportional to 15,883.91, 21,924.09 and 9,912.05

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Solution

The fourth proportional to 15,883.91, 21,924.09 and 9,912.05 is: 13,681.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,883.91 : 21,924.09 = 9,912.05 : x
  2. Step 2: Convert to fraction form
    15,883.91/21,924.09 = 9,912.05/x
  3. Step 3: Cross multiply
    15,883.91x = 21,924.09 × 9,912.05
  4. Step 4: Simplify right side
    15,883.91x = 217,312,566.66
  5. Step 5: Solve for x
    x = 217,312,566.66/15,883.91
  6. Step 6: Final answer
    x = 13,681.31

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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.