Home / 18,870.98-28,309.89-7,771.62

Finding the Fourth Proportional to 18,870.98, 28,309.89 and 7,771.62

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Solution

The fourth proportional to 18,870.98, 28,309.89 and 7,771.62 is: 11,658.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,870.98 : 28,309.89 = 7,771.62 : x
  2. Step 2: Convert to fraction form
    18,870.98/28,309.89 = 7,771.62/x
  3. Step 3: Cross multiply
    18,870.98x = 28,309.89 × 7,771.62
  4. Step 4: Simplify right side
    18,870.98x = 220,013,707.32
  5. Step 5: Solve for x
    x = 220,013,707.32/18,870.98
  6. Step 6: Final answer
    x = 11,658.84

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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.