Home / 28,507.21-42,714.06-20,146.39

Finding the Fourth Proportional to 28,507.21, 42,714.06 and 20,146.39

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Solution

The fourth proportional to 28,507.21, 42,714.06 and 20,146.39 is: 30,186.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,507.21 : 42,714.06 = 20,146.39 : x
  2. Step 2: Convert to fraction form
    28,507.21/42,714.06 = 20,146.39/x
  3. Step 3: Cross multiply
    28,507.21x = 42,714.06 × 20,146.39
  4. Step 4: Simplify right side
    28,507.21x = 860,534,111.24
  5. Step 5: Solve for x
    x = 860,534,111.24/28,507.21
  6. Step 6: Final answer
    x = 30,186.54

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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.