Home / 30,855.90-42,580.28-18,280.65

Finding the Fourth Proportional to 30,855.90, 42,580.28 and 18,280.65

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Solution

The fourth proportional to 30,855.90, 42,580.28 and 18,280.65 is: 25,226.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,855.90 : 42,580.28 = 18,280.65 : x
  2. Step 2: Convert to fraction form
    30,855.90/42,580.28 = 18,280.65/x
  3. Step 3: Cross multiply
    30,855.90x = 42,580.28 × 18,280.65
  4. Step 4: Simplify right side
    30,855.90x = 778,395,195.58
  5. Step 5: Solve for x
    x = 778,395,195.58/30,855.90
  6. Step 6: Final answer
    x = 25,226.79

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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.