Home / 18,900.18-28,356.64-8,368.76

Finding the Fourth Proportional to 18,900.18, 28,356.64 and 8,368.76

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Solution

The fourth proportional to 18,900.18, 28,356.64 and 8,368.76 is: 12,555.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,900.18 : 28,356.64 = 8,368.76 : x
  2. Step 2: Convert to fraction form
    18,900.18/28,356.64 = 8,368.76/x
  3. Step 3: Cross multiply
    18,900.18x = 28,356.64 × 8,368.76
  4. Step 4: Simplify right side
    18,900.18x = 237,309,914.57
  5. Step 5: Solve for x
    x = 237,309,914.57/18,900.18
  6. Step 6: Final answer
    x = 12,555.96

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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.