Home / 18,870.48-28,309.14-7,771.12

Finding the Fourth Proportional to 18,870.48, 28,309.14 and 7,771.12

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Solution

The fourth proportional to 18,870.48, 28,309.14 and 7,771.12 is: 11,658.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,870.48 : 28,309.14 = 7,771.12 : x
  2. Step 2: Convert to fraction form
    18,870.48/28,309.14 = 7,771.12/x
  3. Step 3: Cross multiply
    18,870.48x = 28,309.14 × 7,771.12
  4. Step 4: Simplify right side
    18,870.48x = 219,993,543.64
  5. Step 5: Solve for x
    x = 219,993,543.64/18,870.48
  6. Step 6: Final answer
    x = 11,658.08

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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.