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Finding the Fourth Proportional to 21,910.19, 32,866.43 and 7,118.01

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Solution

The fourth proportional to 21,910.19, 32,866.43 and 7,118.01 is: 10,677.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,910.19 : 32,866.43 = 7,118.01 : x
  2. Step 2: Convert to fraction form
    21,910.19/32,866.43 = 7,118.01/x
  3. Step 3: Cross multiply
    21,910.19x = 32,866.43 × 7,118.01
  4. Step 4: Simplify right side
    21,910.19x = 233,943,541.81
  5. Step 5: Solve for x
    x = 233,943,541.81/21,910.19
  6. Step 6: Final answer
    x = 10,677.39

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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.