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Finding the Fourth Proportional to 7,031.36, 9,703.24 and 3,887.44

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Solution

The fourth proportional to 7,031.36, 9,703.24 and 3,887.44 is: 5,364.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,031.36 : 9,703.24 = 3,887.44 : x
  2. Step 2: Convert to fraction form
    7,031.36/9,703.24 = 3,887.44/x
  3. Step 3: Cross multiply
    7,031.36x = 9,703.24 × 3,887.44
  4. Step 4: Simplify right side
    7,031.36x = 37,720,763.31
  5. Step 5: Solve for x
    x = 37,720,763.31/7,031.36
  6. Step 6: Final answer
    x = 5,364.65

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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.