Home / 28,455.12-39,268.10-15,879.88

Finding the Fourth Proportional to 28,455.12, 39,268.10 and 15,879.88

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Solution

The fourth proportional to 28,455.12, 39,268.10 and 15,879.88 is: 21,914.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,455.12 : 39,268.10 = 15,879.88 : x
  2. Step 2: Convert to fraction form
    28,455.12/39,268.10 = 15,879.88/x
  3. Step 3: Cross multiply
    28,455.12x = 39,268.10 × 15,879.88
  4. Step 4: Simplify right side
    28,455.12x = 623,572,715.83
  5. Step 5: Solve for x
    x = 623,572,715.83/28,455.12
  6. Step 6: Final answer
    x = 21,914.25

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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.