Home / 28,155.21-42,287.49-20,730.35

Finding the Fourth Proportional to 28,155.21, 42,287.49 and 20,730.35

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Solution

The fourth proportional to 28,155.21, 42,287.49 and 20,730.35 is: 31,135.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,155.21 : 42,287.49 = 20,730.35 : x
  2. Step 2: Convert to fraction form
    28,155.21/42,287.49 = 20,730.35/x
  3. Step 3: Cross multiply
    28,155.21x = 42,287.49 × 20,730.35
  4. Step 4: Simplify right side
    28,155.21x = 876,634,256.88
  5. Step 5: Solve for x
    x = 876,634,256.88/28,155.21
  6. Step 6: Final answer
    x = 31,135.77

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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.