Home / 3,913.88-5,402.76-2,421.32

Finding the Fourth Proportional to 3,913.88, 5,402.76 and 2,421.32

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Solution

The fourth proportional to 3,913.88, 5,402.76 and 2,421.32 is: 3,342.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,913.88 : 5,402.76 = 2,421.32 : x
  2. Step 2: Convert to fraction form
    3,913.88/5,402.76 = 2,421.32/x
  3. Step 3: Cross multiply
    3,913.88x = 5,402.76 × 2,421.32
  4. Step 4: Simplify right side
    3,913.88x = 13,081,810.84
  5. Step 5: Solve for x
    x = 13,081,810.84/3,913.88
  6. Step 6: Final answer
    x = 3,342.41

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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.