Home / 28,437.57-39,243.58-15,690.87

Finding the Fourth Proportional to 28,437.57, 39,243.58 and 15,690.87

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Solution

The fourth proportional to 28,437.57, 39,243.58 and 15,690.87 is: 21,653.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,437.57 : 39,243.58 = 15,690.87 : x
  2. Step 2: Convert to fraction form
    28,437.57/39,243.58 = 15,690.87/x
  3. Step 3: Cross multiply
    28,437.57x = 39,243.58 × 15,690.87
  4. Step 4: Simplify right side
    28,437.57x = 615,765,912.11
  5. Step 5: Solve for x
    x = 615,765,912.11/28,437.57
  6. Step 6: Final answer
    x = 21,653.25

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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.