Home / 28,612.38-39,485.06-15,865.58

Finding the Fourth Proportional to 28,612.38, 39,485.06 and 15,865.58

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Solution

The fourth proportional to 28,612.38, 39,485.06 and 15,865.58 is: 21,894.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,612.38 : 39,485.06 = 15,865.58 : x
  2. Step 2: Convert to fraction form
    28,612.38/39,485.06 = 15,865.58/x
  3. Step 3: Cross multiply
    28,612.38x = 39,485.06 × 15,865.58
  4. Step 4: Simplify right side
    28,612.38x = 626,453,378.23
  5. Step 5: Solve for x
    x = 626,453,378.23/28,612.38
  6. Step 6: Final answer
    x = 21,894.49

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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.