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Finding the Fourth Proportional to 28,163.12, 42,254.04 and 9,445

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Solution

The fourth proportional to 28,163.12, 42,254.04 and 9,445 is: 14,170.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,163.12 : 42,254.04 = 9,445 : x
  2. Step 2: Convert to fraction form
    28,163.12/42,254.04 = 9,445/x
  3. Step 3: Cross multiply
    28,163.12x = 42,254.04 × 9,445
  4. Step 4: Simplify right side
    28,163.12x = 399,089,407.80
  5. Step 5: Solve for x
    x = 399,089,407.80/28,163.12
  6. Step 6: Final answer
    x = 14,170.64

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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.