Home / 18,776.90-28,156.26-7,679.18

Finding the Fourth Proportional to 18,776.90, 28,156.26 and 7,679.18

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Solution

The fourth proportional to 18,776.90, 28,156.26 and 7,679.18 is: 11,515.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,776.90 : 28,156.26 = 7,679.18 : x
  2. Step 2: Convert to fraction form
    18,776.90/28,156.26 = 7,679.18/x
  3. Step 3: Cross multiply
    18,776.90x = 28,156.26 × 7,679.18
  4. Step 4: Simplify right side
    18,776.90x = 216,216,988.67
  5. Step 5: Solve for x
    x = 216,216,988.67/18,776.90
  6. Step 6: Final answer
    x = 11,515.05

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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.