Home / 28,371.12-42,571.08-12,785.28

Finding the Fourth Proportional to 28,371.12, 42,571.08 and 12,785.28

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Solution

The fourth proportional to 28,371.12, 42,571.08 and 12,785.28 is: 19,184.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,371.12 : 42,571.08 = 12,785.28 : x
  2. Step 2: Convert to fraction form
    28,371.12/42,571.08 = 12,785.28/x
  3. Step 3: Cross multiply
    28,371.12x = 42,571.08 × 12,785.28
  4. Step 4: Simplify right side
    28,371.12x = 544,283,177.70
  5. Step 5: Solve for x
    x = 544,283,177.70/28,371.12
  6. Step 6: Final answer
    x = 19,184.41

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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.