Home / 7,021.68-9,689.58-3,877.80

Finding the Fourth Proportional to 7,021.68, 9,689.58 and 3,877.80

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Solution

The fourth proportional to 7,021.68, 9,689.58 and 3,877.80 is: 5,351.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,021.68 : 9,689.58 = 3,877.80 : x
  2. Step 2: Convert to fraction form
    7,021.68/9,689.58 = 3,877.80/x
  3. Step 3: Cross multiply
    7,021.68x = 9,689.58 × 3,877.80
  4. Step 4: Simplify right side
    7,021.68x = 37,574,253.32
  5. Step 5: Solve for x
    x = 37,574,253.32/7,021.68
  6. Step 6: Final answer
    x = 5,351.18

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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.