Home / 18,860.90-28,280.84-7,775.10

Finding the Fourth Proportional to 18,860.90, 28,280.84 and 7,775.10

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Solution

The fourth proportional to 18,860.90, 28,280.84 and 7,775.10 is: 11,658.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,860.90 : 28,280.84 = 7,775.10 : x
  2. Step 2: Convert to fraction form
    18,860.90/28,280.84 = 7,775.10/x
  3. Step 3: Cross multiply
    18,860.90x = 28,280.84 × 7,775.10
  4. Step 4: Simplify right side
    18,860.90x = 219,886,320.21
  5. Step 5: Solve for x
    x = 219,886,320.21/18,860.90
  6. Step 6: Final answer
    x = 11,658.32

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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.