Home / 18,860.84-28,307.70-7,775.48

Finding the Fourth Proportional to 18,860.84, 28,307.70 and 7,775.48

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Solution

The fourth proportional to 18,860.84, 28,307.70 and 7,775.48 is: 11,669.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,860.84 : 28,307.70 = 7,775.48 : x
  2. Step 2: Convert to fraction form
    18,860.84/28,307.70 = 7,775.48/x
  3. Step 3: Cross multiply
    18,860.84x = 28,307.70 × 7,775.48
  4. Step 4: Simplify right side
    18,860.84x = 220,105,813.66
  5. Step 5: Solve for x
    x = 220,105,813.66/18,860.84
  6. Step 6: Final answer
    x = 11,669.99

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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.