Home / 28,316.72-39,078.96-18,740.08

Finding the Fourth Proportional to 28,316.72, 39,078.96 and 18,740.08

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Solution

The fourth proportional to 28,316.72, 39,078.96 and 18,740.08 is: 25,862.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,316.72 : 39,078.96 = 18,740.08 : x
  2. Step 2: Convert to fraction form
    28,316.72/39,078.96 = 18,740.08/x
  3. Step 3: Cross multiply
    28,316.72x = 39,078.96 × 18,740.08
  4. Step 4: Simplify right side
    28,316.72x = 732,342,836.72
  5. Step 5: Solve for x
    x = 732,342,836.72/28,316.72
  6. Step 6: Final answer
    x = 25,862.56

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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.