Home / 28,512.30-42,768.45-11,866.80

Finding the Fourth Proportional to 28,512.30, 42,768.45 and 11,866.80

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Solution

The fourth proportional to 28,512.30, 42,768.45 and 11,866.80 is: 17,800.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,512.30 : 42,768.45 = 11,866.80 : x
  2. Step 2: Convert to fraction form
    28,512.30/42,768.45 = 11,866.80/x
  3. Step 3: Cross multiply
    28,512.30x = 42,768.45 × 11,866.80
  4. Step 4: Simplify right side
    28,512.30x = 507,524,642.46
  5. Step 5: Solve for x
    x = 507,524,642.46/28,512.30
  6. Step 6: Final answer
    x = 17,800.20

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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.