Home / 18,870.56-28,313.46-7,782.80

Finding the Fourth Proportional to 18,870.56, 28,313.46 and 7,782.80

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Solution

The fourth proportional to 18,870.56, 28,313.46 and 7,782.80 is: 11,677.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,870.56 : 28,313.46 = 7,782.80 : x
  2. Step 2: Convert to fraction form
    18,870.56/28,313.46 = 7,782.80/x
  3. Step 3: Cross multiply
    18,870.56x = 28,313.46 × 7,782.80
  4. Step 4: Simplify right side
    18,870.56x = 220,357,996.49
  5. Step 5: Solve for x
    x = 220,357,996.49/18,870.56
  6. Step 6: Final answer
    x = 11,677.34

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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.