Home / 28,156.61-42,222.47-8,431.49

Finding the Fourth Proportional to 28,156.61, 42,222.47 and 8,431.49

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Solution

The fourth proportional to 28,156.61, 42,222.47 and 8,431.49 is: 12,643.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,156.61 : 42,222.47 = 8,431.49 : x
  2. Step 2: Convert to fraction form
    28,156.61/42,222.47 = 8,431.49/x
  3. Step 3: Cross multiply
    28,156.61x = 42,222.47 × 8,431.49
  4. Step 4: Simplify right side
    28,156.61x = 355,998,396.98
  5. Step 5: Solve for x
    x = 355,998,396.98/28,156.61
  6. Step 6: Final answer
    x = 12,643.51

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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.