Home / 12,087.60-18,131.58-7,437.40

Finding the Fourth Proportional to 12,087.60, 18,131.58 and 7,437.40

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Solution

The fourth proportional to 12,087.60, 18,131.58 and 7,437.40 is: 11,156.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,087.60 : 18,131.58 = 7,437.40 : x
  2. Step 2: Convert to fraction form
    12,087.60/18,131.58 = 7,437.40/x
  3. Step 3: Cross multiply
    12,087.60x = 18,131.58 × 7,437.40
  4. Step 4: Simplify right side
    12,087.60x = 134,851,813.09
  5. Step 5: Solve for x
    x = 134,851,813.09/12,087.60
  6. Step 6: Final answer
    x = 11,156.21

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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.