Home / 10,423.45-15,638.78-4,579.21

Finding the Fourth Proportional to 10,423.45, 15,638.78 and 4,579.21

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Solution

The fourth proportional to 10,423.45, 15,638.78 and 4,579.21 is: 6,870.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,423.45 : 15,638.78 = 4,579.21 : x
  2. Step 2: Convert to fraction form
    10,423.45/15,638.78 = 4,579.21/x
  3. Step 3: Cross multiply
    10,423.45x = 15,638.78 × 4,579.21
  4. Step 4: Simplify right side
    10,423.45x = 71,613,257.76
  5. Step 5: Solve for x
    x = 71,613,257.76/10,423.45
  6. Step 6: Final answer
    x = 6,870.40

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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.