Home / 19,078.78-28,612.59-7,389.22

Finding the Fourth Proportional to 19,078.78, 28,612.59 and 7,389.22

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Solution

The fourth proportional to 19,078.78, 28,612.59 and 7,389.22 is: 11,081.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,078.78 : 28,612.59 = 7,389.22 : x
  2. Step 2: Convert to fraction form
    19,078.78/28,612.59 = 7,389.22/x
  3. Step 3: Cross multiply
    19,078.78x = 28,612.59 × 7,389.22
  4. Step 4: Simplify right side
    19,078.78x = 211,424,722.28
  5. Step 5: Solve for x
    x = 211,424,722.28/19,078.78
  6. Step 6: Final answer
    x = 11,081.67

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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.