Home / 28,431.07-39,233.23-15,684.30

Finding the Fourth Proportional to 28,431.07, 39,233.23 and 15,684.30

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Solution

The fourth proportional to 28,431.07, 39,233.23 and 15,684.30 is: 21,643.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,431.07 : 39,233.23 = 15,684.30 : x
  2. Step 2: Convert to fraction form
    28,431.07/39,233.23 = 15,684.30/x
  3. Step 3: Cross multiply
    28,431.07x = 39,233.23 × 15,684.30
  4. Step 4: Simplify right side
    28,431.07x = 615,345,710.08
  5. Step 5: Solve for x
    x = 615,345,710.08/28,431.07
  6. Step 6: Final answer
    x = 21,643.43

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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.