Home / 28,558.43-39,405.15-18,485.47

Finding the Fourth Proportional to 28,558.43, 39,405.15 and 18,485.47

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Solution

The fourth proportional to 28,558.43, 39,405.15 and 18,485.47 is: 25,506.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,558.43 : 39,405.15 = 18,485.47 : x
  2. Step 2: Convert to fraction form
    28,558.43/39,405.15 = 18,485.47/x
  3. Step 3: Cross multiply
    28,558.43x = 39,405.15 × 18,485.47
  4. Step 4: Simplify right side
    28,558.43x = 728,422,718.17
  5. Step 5: Solve for x
    x = 728,422,718.17/28,558.43
  6. Step 6: Final answer
    x = 25,506.40

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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.