Home / 19,123.39-28,678.11-6,640.06

Finding the Fourth Proportional to 19,123.39, 28,678.11 and 6,640.06

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Solution

The fourth proportional to 19,123.39, 28,678.11 and 6,640.06 is: 9,957.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,123.39 : 28,678.11 = 6,640.06 : x
  2. Step 2: Convert to fraction form
    19,123.39/28,678.11 = 6,640.06/x
  3. Step 3: Cross multiply
    19,123.39x = 28,678.11 × 6,640.06
  4. Step 4: Simplify right side
    19,123.39x = 190,424,371.09
  5. Step 5: Solve for x
    x = 190,424,371.09/19,123.39
  6. Step 6: Final answer
    x = 9,957.67

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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.