Home / 18,900.12-28,356.55-8,368.70

Finding the Fourth Proportional to 18,900.12, 28,356.55 and 8,368.70

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Solution

The fourth proportional to 18,900.12, 28,356.55 and 8,368.70 is: 12,555.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,900.12 : 28,356.55 = 8,368.70 : x
  2. Step 2: Convert to fraction form
    18,900.12/28,356.55 = 8,368.70/x
  3. Step 3: Cross multiply
    18,900.12x = 28,356.55 × 8,368.70
  4. Step 4: Simplify right side
    18,900.12x = 237,307,347.25
  5. Step 5: Solve for x
    x = 237,307,347.25/18,900.12
  6. Step 6: Final answer
    x = 12,555.87

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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.