Home / 30,962.52-42,728.40-16,815.60

Finding the Fourth Proportional to 30,962.52, 42,728.40 and 16,815.60

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Solution

The fourth proportional to 30,962.52, 42,728.40 and 16,815.60 is: 23,205.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,962.52 : 42,728.40 = 16,815.60 : x
  2. Step 2: Convert to fraction form
    30,962.52/42,728.40 = 16,815.60/x
  3. Step 3: Cross multiply
    30,962.52x = 42,728.40 × 16,815.60
  4. Step 4: Simplify right side
    30,962.52x = 718,503,683.04
  5. Step 5: Solve for x
    x = 718,503,683.04/30,962.52
  6. Step 6: Final answer
    x = 23,205.59

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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.