Home / 5,316.84-7,974.64-1,421.55

Finding the Fourth Proportional to 5,316.84, 7,974.64 and 1,421.55

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Solution

The fourth proportional to 5,316.84, 7,974.64 and 1,421.55 is: 2,132.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,316.84 : 7,974.64 = 1,421.55 : x
  2. Step 2: Convert to fraction form
    5,316.84/7,974.64 = 1,421.55/x
  3. Step 3: Cross multiply
    5,316.84x = 7,974.64 × 1,421.55
  4. Step 4: Simplify right side
    5,316.84x = 11,336,349.49
  5. Step 5: Solve for x
    x = 11,336,349.49/5,316.84
  6. Step 6: Final answer
    x = 2,132.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.