Home / 12,139.74-18,216.90-4,744.98

Finding the Fourth Proportional to 12,139.74, 18,216.90 and 4,744.98

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Solution

The fourth proportional to 12,139.74, 18,216.90 and 4,744.98 is: 7,120.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,139.74 : 18,216.90 = 4,744.98 : x
  2. Step 2: Convert to fraction form
    12,139.74/18,216.90 = 4,744.98/x
  3. Step 3: Cross multiply
    12,139.74x = 18,216.90 × 4,744.98
  4. Step 4: Simplify right side
    12,139.74x = 86,438,826.16
  5. Step 5: Solve for x
    x = 86,438,826.16/12,139.74
  6. Step 6: Final answer
    x = 7,120.32

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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.