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Finding the Fourth Proportional to 4,667.95, 6,430.35 and 3,921.40

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Solution

The fourth proportional to 4,667.95, 6,430.35 and 3,921.40 is: 5,401.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,667.95 : 6,430.35 = 3,921.40 : x
  2. Step 2: Convert to fraction form
    4,667.95/6,430.35 = 3,921.40/x
  3. Step 3: Cross multiply
    4,667.95x = 6,430.35 × 3,921.40
  4. Step 4: Simplify right side
    4,667.95x = 25,215,974.49
  5. Step 5: Solve for x
    x = 25,215,974.49/4,667.95
  6. Step 6: Final answer
    x = 5,401.94

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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.