Home / 28,112.80-42,140.40-15,613.60

Finding the Fourth Proportional to 28,112.80, 42,140.40 and 15,613.60

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Solution

The fourth proportional to 28,112.80, 42,140.40 and 15,613.60 is: 23,404.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,112.80 : 42,140.40 = 15,613.60 : x
  2. Step 2: Convert to fraction form
    28,112.80/42,140.40 = 15,613.60/x
  3. Step 3: Cross multiply
    28,112.80x = 42,140.40 × 15,613.60
  4. Step 4: Simplify right side
    28,112.80x = 657,963,349.44
  5. Step 5: Solve for x
    x = 657,963,349.44/28,112.80
  6. Step 6: Final answer
    x = 23,404.40

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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.