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Finding the Fourth Proportional to 7,031.61, 9,703.64 and 4,047.39

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Solution

The fourth proportional to 7,031.61, 9,703.64 and 4,047.39 is: 5,585.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,031.61 : 9,703.64 = 4,047.39 : x
  2. Step 2: Convert to fraction form
    7,031.61/9,703.64 = 4,047.39/x
  3. Step 3: Cross multiply
    7,031.61x = 9,703.64 × 4,047.39
  4. Step 4: Simplify right side
    7,031.61x = 39,274,425.62
  5. Step 5: Solve for x
    x = 39,274,425.62/7,031.61
  6. Step 6: Final answer
    x = 5,585.41

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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.