Home / 7,021.48-9,689.70-3,877.72

Finding the Fourth Proportional to 7,021.48, 9,689.70 and 3,877.72

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Solution

The fourth proportional to 7,021.48, 9,689.70 and 3,877.72 is: 5,351.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,021.48 : 9,689.70 = 3,877.72 : x
  2. Step 2: Convert to fraction form
    7,021.48/9,689.70 = 3,877.72/x
  3. Step 3: Cross multiply
    7,021.48x = 9,689.70 × 3,877.72
  4. Step 4: Simplify right side
    7,021.48x = 37,573,943.48
  5. Step 5: Solve for x
    x = 37,573,943.48/7,021.48
  6. Step 6: Final answer
    x = 5,351.29

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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.