Home / 28,140.97-42,181.08-18,287.32

Finding the Fourth Proportional to 28,140.97, 42,181.08 and 18,287.32

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Solution

The fourth proportional to 28,140.97, 42,181.08 and 18,287.32 is: 27,411.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,140.97 : 42,181.08 = 18,287.32 : x
  2. Step 2: Convert to fraction form
    28,140.97/42,181.08 = 18,287.32/x
  3. Step 3: Cross multiply
    28,140.97x = 42,181.08 × 18,287.32
  4. Step 4: Simplify right side
    28,140.97x = 771,378,907.91
  5. Step 5: Solve for x
    x = 771,378,907.91/28,140.97
  6. Step 6: Final answer
    x = 27,411.24

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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.