Home / 28,886.56-39,880.64-18,285.28

Finding the Fourth Proportional to 28,886.56, 39,880.64 and 18,285.28

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Solution

The fourth proportional to 28,886.56, 39,880.64 and 18,285.28 is: 25,244.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,886.56 : 39,880.64 = 18,285.28 : x
  2. Step 2: Convert to fraction form
    28,886.56/39,880.64 = 18,285.28/x
  3. Step 3: Cross multiply
    28,886.56x = 39,880.64 × 18,285.28
  4. Step 4: Simplify right side
    28,886.56x = 729,228,668.98
  5. Step 5: Solve for x
    x = 729,228,668.98/28,886.56
  6. Step 6: Final answer
    x = 25,244.57

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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.