Home / 28,458.28-42,683.72-8,735.20

Finding the Fourth Proportional to 28,458.28, 42,683.72 and 8,735.20

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Solution

The fourth proportional to 28,458.28, 42,683.72 and 8,735.20 is: 13,101.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,458.28 : 42,683.72 = 8,735.20 : x
  2. Step 2: Convert to fraction form
    28,458.28/42,683.72 = 8,735.20/x
  3. Step 3: Cross multiply
    28,458.28x = 42,683.72 × 8,735.20
  4. Step 4: Simplify right side
    28,458.28x = 372,850,830.94
  5. Step 5: Solve for x
    x = 372,850,830.94/28,458.28
  6. Step 6: Final answer
    x = 13,101.66

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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.