Home / 28,455.12-39,268.53-18,911.16

Finding the Fourth Proportional to 28,455.12, 39,268.53 and 18,911.16

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Solution

The fourth proportional to 28,455.12, 39,268.53 and 18,911.16 is: 26,097.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,455.12 : 39,268.53 = 18,911.16 : x
  2. Step 2: Convert to fraction form
    28,455.12/39,268.53 = 18,911.16/x
  3. Step 3: Cross multiply
    28,455.12x = 39,268.53 × 18,911.16
  4. Step 4: Simplify right side
    28,455.12x = 742,613,453.79
  5. Step 5: Solve for x
    x = 742,613,453.79/28,455.12
  6. Step 6: Final answer
    x = 26,097.71

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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.