Home / 12,089.20-18,133.80-8,172.40

Finding the Fourth Proportional to 12,089.20, 18,133.80 and 8,172.40

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Solution

The fourth proportional to 12,089.20, 18,133.80 and 8,172.40 is: 12,258.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,089.20 : 18,133.80 = 8,172.40 : x
  2. Step 2: Convert to fraction form
    12,089.20/18,133.80 = 8,172.40/x
  3. Step 3: Cross multiply
    12,089.20x = 18,133.80 × 8,172.40
  4. Step 4: Simplify right side
    12,089.20x = 148,196,667.12
  5. Step 5: Solve for x
    x = 148,196,667.12/12,089.20
  6. Step 6: Final answer
    x = 12,258.60

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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.