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Finding the Fourth Proportional to 21,903.90, 32,859.48 and 7,109.70

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Solution

The fourth proportional to 21,903.90, 32,859.48 and 7,109.70 is: 10,665.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,903.90 : 32,859.48 = 7,109.70 : x
  2. Step 2: Convert to fraction form
    21,903.90/32,859.48 = 7,109.70/x
  3. Step 3: Cross multiply
    21,903.90x = 32,859.48 × 7,109.70
  4. Step 4: Simplify right side
    21,903.90x = 233,621,044.96
  5. Step 5: Solve for x
    x = 233,621,044.96/21,903.90
  6. Step 6: Final answer
    x = 10,665.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.