Home / 28,428.67-39,231.48-15,853.42

Finding the Fourth Proportional to 28,428.67, 39,231.48 and 15,853.42

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Solution

The fourth proportional to 28,428.67, 39,231.48 and 15,853.42 is: 21,877.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,428.67 : 39,231.48 = 15,853.42 : x
  2. Step 2: Convert to fraction form
    28,428.67/39,231.48 = 15,853.42/x
  3. Step 3: Cross multiply
    28,428.67x = 39,231.48 × 15,853.42
  4. Step 4: Simplify right side
    28,428.67x = 621,953,129.66
  5. Step 5: Solve for x
    x = 621,953,129.66/28,428.67
  6. Step 6: Final answer
    x = 21,877.67

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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.