Home / 30,987.54-42,763.14-17,558.55

Finding the Fourth Proportional to 30,987.54, 42,763.14 and 17,558.55

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Solution

The fourth proportional to 30,987.54, 42,763.14 and 17,558.55 is: 24,230.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,987.54 : 42,763.14 = 17,558.55 : x
  2. Step 2: Convert to fraction form
    30,987.54/42,763.14 = 17,558.55/x
  3. Step 3: Cross multiply
    30,987.54x = 42,763.14 × 17,558.55
  4. Step 4: Simplify right side
    30,987.54x = 750,858,731.85
  5. Step 5: Solve for x
    x = 750,858,731.85/30,987.54
  6. Step 6: Final answer
    x = 24,230.99

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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.