Home / 28,376.72-39,158.34-15,629.48

Finding the Fourth Proportional to 28,376.72, 39,158.34 and 15,629.48

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Solution

The fourth proportional to 28,376.72, 39,158.34 and 15,629.48 is: 21,567.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,376.72 : 39,158.34 = 15,629.48 : x
  2. Step 2: Convert to fraction form
    28,376.72/39,158.34 = 15,629.48/x
  3. Step 3: Cross multiply
    28,376.72x = 39,158.34 × 15,629.48
  4. Step 4: Simplify right side
    28,376.72x = 612,024,491.86
  5. Step 5: Solve for x
    x = 612,024,491.86/28,376.72
  6. Step 6: Final answer
    x = 21,567.84

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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.