Home / 28,148.60-42,220.46-8,431.58

Finding the Fourth Proportional to 28,148.60, 42,220.46 and 8,431.58

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Solution

The fourth proportional to 28,148.60, 42,220.46 and 8,431.58 is: 12,646.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,148.60 : 42,220.46 = 8,431.58 : x
  2. Step 2: Convert to fraction form
    28,148.60/42,220.46 = 8,431.58/x
  3. Step 3: Cross multiply
    28,148.60x = 42,220.46 × 8,431.58
  4. Step 4: Simplify right side
    28,148.60x = 355,985,186.13
  5. Step 5: Solve for x
    x = 355,985,186.13/28,148.60
  6. Step 6: Final answer
    x = 12,646.64

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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.