Home / 28,176.89-42,272.36-8,455.81

Finding the Fourth Proportional to 28,176.89, 42,272.36 and 8,455.81

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Solution

The fourth proportional to 28,176.89, 42,272.36 and 8,455.81 is: 12,685.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,176.89 : 42,272.36 = 8,455.81 : x
  2. Step 2: Convert to fraction form
    28,176.89/42,272.36 = 8,455.81/x
  3. Step 3: Cross multiply
    28,176.89x = 42,272.36 × 8,455.81
  4. Step 4: Simplify right side
    28,176.89x = 357,447,044.41
  5. Step 5: Solve for x
    x = 357,447,044.41/28,176.89
  6. Step 6: Final answer
    x = 12,685.82

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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.