Home / 28,076.64-38,729.52-18,140.64

Finding the Fourth Proportional to 28,076.64, 38,729.52 and 18,140.64

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Solution

The fourth proportional to 28,076.64, 38,729.52 and 18,140.64 is: 25,023.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,076.64 : 38,729.52 = 18,140.64 : x
  2. Step 2: Convert to fraction form
    28,076.64/38,729.52 = 18,140.64/x
  3. Step 3: Cross multiply
    28,076.64x = 38,729.52 × 18,140.64
  4. Step 4: Simplify right side
    28,076.64x = 702,578,279.69
  5. Step 5: Solve for x
    x = 702,578,279.69/28,076.64
  6. Step 6: Final answer
    x = 25,023.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.