Home / 5,389.74-7,438.23-3,897.18

Finding the Fourth Proportional to 5,389.74, 7,438.23 and 3,897.18

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Solution

The fourth proportional to 5,389.74, 7,438.23 and 3,897.18 is: 5,378.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,389.74 : 7,438.23 = 3,897.18 : x
  2. Step 2: Convert to fraction form
    5,389.74/7,438.23 = 3,897.18/x
  3. Step 3: Cross multiply
    5,389.74x = 7,438.23 × 3,897.18
  4. Step 4: Simplify right side
    5,389.74x = 28,988,121.19
  5. Step 5: Solve for x
    x = 28,988,121.19/5,389.74
  6. Step 6: Final answer
    x = 5,378.39

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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.