Home / 28,881.36-39,862.80-18,284.40

Finding the Fourth Proportional to 28,881.36, 39,862.80 and 18,284.40

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Solution

The fourth proportional to 28,881.36, 39,862.80 and 18,284.40 is: 25,236.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,881.36 : 39,862.80 = 18,284.40 : x
  2. Step 2: Convert to fraction form
    28,881.36/39,862.80 = 18,284.40/x
  3. Step 3: Cross multiply
    28,881.36x = 39,862.80 × 18,284.40
  4. Step 4: Simplify right side
    28,881.36x = 728,867,380.32
  5. Step 5: Solve for x
    x = 728,867,380.32/28,881.36
  6. Step 6: Final answer
    x = 25,236.60

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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.