Home / 3,897.50-5,378.91-2,218.98

Finding the Fourth Proportional to 3,897.50, 5,378.91 and 2,218.98

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Solution

The fourth proportional to 3,897.50, 5,378.91 and 2,218.98 is: 3,062.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,897.50 : 5,378.91 = 2,218.98 : x
  2. Step 2: Convert to fraction form
    3,897.50/5,378.91 = 2,218.98/x
  3. Step 3: Cross multiply
    3,897.50x = 5,378.91 × 2,218.98
  4. Step 4: Simplify right side
    3,897.50x = 11,935,693.71
  5. Step 5: Solve for x
    x = 11,935,693.71/3,897.50
  6. Step 6: Final answer
    x = 3,062.40

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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.