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Finding the Fourth Proportional to 28,323, 39,085.74 and 15,750.24

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Solution

The fourth proportional to 28,323, 39,085.74 and 15,750.24 is: 21,735.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,323 : 39,085.74 = 15,750.24 : x
  2. Step 2: Convert to fraction form
    28,323/39,085.74 = 15,750.24/x
  3. Step 3: Cross multiply
    28,323x = 39,085.74 × 15,750.24
  4. Step 4: Simplify right side
    28,323x = 615,609,785.58
  5. Step 5: Solve for x
    x = 615,609,785.58/28,323
  6. Step 6: Final answer
    x = 21,735.33

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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.