Home / 28,915.40-43,300.20-21,479.60

Finding the Fourth Proportional to 28,915.40, 43,300.20 and 21,479.60

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Solution

The fourth proportional to 28,915.40, 43,300.20 and 21,479.60 is: 32,165.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,915.40 : 43,300.20 = 21,479.60 : x
  2. Step 2: Convert to fraction form
    28,915.40/43,300.20 = 21,479.60/x
  3. Step 3: Cross multiply
    28,915.40x = 43,300.20 × 21,479.60
  4. Step 4: Simplify right side
    28,915.40x = 930,070,975.92
  5. Step 5: Solve for x
    x = 930,070,975.92/28,915.40
  6. Step 6: Final answer
    x = 32,165.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.