Home / 28,353.03-39,128.72-15,778.05

Finding the Fourth Proportional to 28,353.03, 39,128.72 and 15,778.05

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Solution

The fourth proportional to 28,353.03, 39,128.72 and 15,778.05 is: 21,774.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,353.03 : 39,128.72 = 15,778.05 : x
  2. Step 2: Convert to fraction form
    28,353.03/39,128.72 = 15,778.05/x
  3. Step 3: Cross multiply
    28,353.03x = 39,128.72 × 15,778.05
  4. Step 4: Simplify right side
    28,353.03x = 617,374,821.71
  5. Step 5: Solve for x
    x = 617,374,821.71/28,353.03
  6. Step 6: Final answer
    x = 21,774.56

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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.