Home / 30,987.89-42,763.62-16,840.74

Finding the Fourth Proportional to 30,987.89, 42,763.62 and 16,840.74

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Solution

The fourth proportional to 30,987.89, 42,763.62 and 16,840.74 is: 23,240.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,987.89 : 42,763.62 = 16,840.74 : x
  2. Step 2: Convert to fraction form
    30,987.89/42,763.62 = 16,840.74/x
  3. Step 3: Cross multiply
    30,987.89x = 42,763.62 × 16,840.74
  4. Step 4: Simplify right side
    30,987.89x = 720,170,821.21
  5. Step 5: Solve for x
    x = 720,170,821.21/30,987.89
  6. Step 6: Final answer
    x = 23,240.39

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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.