Home / 10,887.84-15,031.44-7,172.64

Finding the Fourth Proportional to 10,887.84, 15,031.44 and 7,172.64

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Solution

The fourth proportional to 10,887.84, 15,031.44 and 7,172.64 is: 9,902.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,887.84 : 15,031.44 = 7,172.64 : x
  2. Step 2: Convert to fraction form
    10,887.84/15,031.44 = 7,172.64/x
  3. Step 3: Cross multiply
    10,887.84x = 15,031.44 × 7,172.64
  4. Step 4: Simplify right side
    10,887.84x = 107,815,107.80
  5. Step 5: Solve for x
    x = 107,815,107.80/10,887.84
  6. Step 6: Final answer
    x = 9,902.34

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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.