Home / 7,031.21-9,702.79-3,887.39

Finding the Fourth Proportional to 7,031.21, 9,702.79 and 3,887.39

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Solution

The fourth proportional to 7,031.21, 9,702.79 and 3,887.39 is: 5,364.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,031.21 : 9,702.79 = 3,887.39 : x
  2. Step 2: Convert to fraction form
    7,031.21/9,702.79 = 3,887.39/x
  3. Step 3: Cross multiply
    7,031.21x = 9,702.79 × 3,887.39
  4. Step 4: Simplify right side
    7,031.21x = 37,718,543.36
  5. Step 5: Solve for x
    x = 37,718,543.36/7,031.21
  6. Step 6: Final answer
    x = 5,364.45

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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.