Home / 28,532.42-39,375.92-15,785.40

Finding the Fourth Proportional to 28,532.42, 39,375.92 and 15,785.40

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Solution

The fourth proportional to 28,532.42, 39,375.92 and 15,785.40 is: 21,784.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,532.42 : 39,375.92 = 15,785.40 : x
  2. Step 2: Convert to fraction form
    28,532.42/39,375.92 = 15,785.40/x
  3. Step 3: Cross multiply
    28,532.42x = 39,375.92 × 15,785.40
  4. Step 4: Simplify right side
    28,532.42x = 621,564,568.64
  5. Step 5: Solve for x
    x = 621,564,568.64/28,532.42
  6. Step 6: Final answer
    x = 21,784.50

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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.