Home / 12,087.20-18,130.80-7,953.50

Finding the Fourth Proportional to 12,087.20, 18,130.80 and 7,953.50

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Solution

The fourth proportional to 12,087.20, 18,130.80 and 7,953.50 is: 11,930.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,087.20 : 18,130.80 = 7,953.50 : x
  2. Step 2: Convert to fraction form
    12,087.20/18,130.80 = 7,953.50/x
  3. Step 3: Cross multiply
    12,087.20x = 18,130.80 × 7,953.50
  4. Step 4: Simplify right side
    12,087.20x = 144,203,317.80
  5. Step 5: Solve for x
    x = 144,203,317.80/12,087.20
  6. Step 6: Final answer
    x = 11,930.25

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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.