Home / 7,031.12-9,702.88-3,887.28

Finding the Fourth Proportional to 7,031.12, 9,702.88 and 3,887.28

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Solution

The fourth proportional to 7,031.12, 9,702.88 and 3,887.28 is: 5,364.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,031.12 : 9,702.88 = 3,887.28 : x
  2. Step 2: Convert to fraction form
    7,031.12/9,702.88 = 3,887.28/x
  3. Step 3: Cross multiply
    7,031.12x = 9,702.88 × 3,887.28
  4. Step 4: Simplify right side
    7,031.12x = 37,717,811.37
  5. Step 5: Solve for x
    x = 37,717,811.37/7,031.12
  6. Step 6: Final answer
    x = 5,364.41

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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.