Home / 28,423.54-42,628.03-8,428.35

Finding the Fourth Proportional to 28,423.54, 42,628.03 and 8,428.35

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Solution

The fourth proportional to 28,423.54, 42,628.03 and 8,428.35 is: 12,640.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,423.54 : 42,628.03 = 8,428.35 : x
  2. Step 2: Convert to fraction form
    28,423.54/42,628.03 = 8,428.35/x
  3. Step 3: Cross multiply
    28,423.54x = 42,628.03 × 8,428.35
  4. Step 4: Simplify right side
    28,423.54x = 359,283,956.65
  5. Step 5: Solve for x
    x = 359,283,956.65/28,423.54
  6. Step 6: Final answer
    x = 12,640.37

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1.5x scale

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.