Home / 10,989.43-15,172.40-7,219.29

Finding the Fourth Proportional to 10,989.43, 15,172.40 and 7,219.29

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Solution

The fourth proportional to 10,989.43, 15,172.40 and 7,219.29 is: 9,967.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,989.43 : 15,172.40 = 7,219.29 : x
  2. Step 2: Convert to fraction form
    10,989.43/15,172.40 = 7,219.29/x
  3. Step 3: Cross multiply
    10,989.43x = 15,172.40 × 7,219.29
  4. Step 4: Simplify right side
    10,989.43x = 109,533,955.60
  5. Step 5: Solve for x
    x = 109,533,955.60/10,989.43
  6. Step 6: Final answer
    x = 9,967.21

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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.