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Finding the Fourth Proportional to 15,873.69, 21,905.93 and 8,704.26

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Solution

The fourth proportional to 15,873.69, 21,905.93 and 8,704.26 is: 12,012.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,873.69 : 21,905.93 = 8,704.26 : x
  2. Step 2: Convert to fraction form
    15,873.69/21,905.93 = 8,704.26/x
  3. Step 3: Cross multiply
    15,873.69x = 21,905.93 × 8,704.26
  4. Step 4: Simplify right side
    15,873.69x = 190,674,883.06
  5. Step 5: Solve for x
    x = 190,674,883.06/15,873.69
  6. Step 6: Final answer
    x = 12,012.01

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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.