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Finding the Fourth Proportional to 7,031.76, 9,703.44 and 3,887.76

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Solution

The fourth proportional to 7,031.76, 9,703.44 and 3,887.76 is: 5,364.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,031.76 : 9,703.44 = 3,887.76 : x
  2. Step 2: Convert to fraction form
    7,031.76/9,703.44 = 3,887.76/x
  3. Step 3: Cross multiply
    7,031.76x = 9,703.44 × 3,887.76
  4. Step 4: Simplify right side
    7,031.76x = 37,724,645.89
  5. Step 5: Solve for x
    x = 37,724,645.89/7,031.76
  6. Step 6: Final answer
    x = 5,364.89

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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.