Home / 28,055.72-42,135.26-18,828.20

Finding the Fourth Proportional to 28,055.72, 42,135.26 and 18,828.20

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Solution

The fourth proportional to 28,055.72, 42,135.26 and 18,828.20 is: 28,276.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,055.72 : 42,135.26 = 18,828.20 : x
  2. Step 2: Convert to fraction form
    28,055.72/42,135.26 = 18,828.20/x
  3. Step 3: Cross multiply
    28,055.72x = 42,135.26 × 18,828.20
  4. Step 4: Simplify right side
    28,055.72x = 793,331,102.33
  5. Step 5: Solve for x
    x = 793,331,102.33/28,055.72
  6. Step 6: Final answer
    x = 28,276.98

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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.