Home / 28,336.78-39,116.28-18,265.78

Finding the Fourth Proportional to 28,336.78, 39,116.28 and 18,265.78

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Solution

The fourth proportional to 28,336.78, 39,116.28 and 18,265.78 is: 25,214.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,336.78 : 39,116.28 = 18,265.78 : x
  2. Step 2: Convert to fraction form
    28,336.78/39,116.28 = 18,265.78/x
  3. Step 3: Cross multiply
    28,336.78x = 39,116.28 × 18,265.78
  4. Step 4: Simplify right side
    28,336.78x = 714,489,364.90
  5. Step 5: Solve for x
    x = 714,489,364.90/28,336.78
  6. Step 6: Final answer
    x = 25,214.20

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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.