Home / 12,288.60-18,432.90-7,088.40

Finding the Fourth Proportional to 12,288.60, 18,432.90 and 7,088.40

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Solution

The fourth proportional to 12,288.60, 18,432.90 and 7,088.40 is: 10,632.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,288.60 : 18,432.90 = 7,088.40 : x
  2. Step 2: Convert to fraction form
    12,288.60/18,432.90 = 7,088.40/x
  3. Step 3: Cross multiply
    12,288.60x = 18,432.90 × 7,088.40
  4. Step 4: Simplify right side
    12,288.60x = 130,659,768.36
  5. Step 5: Solve for x
    x = 130,659,768.36/12,288.60
  6. Step 6: Final answer
    x = 10,632.60

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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.