Home / 28,122.08-42,182.80-8,400.80

Finding the Fourth Proportional to 28,122.08, 42,182.80 and 8,400.80

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Solution

The fourth proportional to 28,122.08, 42,182.80 and 8,400.80 is: 12,601.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,122.08 : 42,182.80 = 8,400.80 : x
  2. Step 2: Convert to fraction form
    28,122.08/42,182.80 = 8,400.80/x
  3. Step 3: Cross multiply
    28,122.08x = 42,182.80 × 8,400.80
  4. Step 4: Simplify right side
    28,122.08x = 354,369,266.24
  5. Step 5: Solve for x
    x = 354,369,266.24/28,122.08
  6. Step 6: Final answer
    x = 12,601.10

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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.