Home / 19,005.28-28,522.40-12,429.60

Finding the Fourth Proportional to 19,005.28, 28,522.40 and 12,429.60

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Solution

The fourth proportional to 19,005.28, 28,522.40 and 12,429.60 is: 18,653.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,005.28 : 28,522.40 = 12,429.60 : x
  2. Step 2: Convert to fraction form
    19,005.28/28,522.40 = 12,429.60/x
  3. Step 3: Cross multiply
    19,005.28x = 28,522.40 × 12,429.60
  4. Step 4: Simplify right side
    19,005.28x = 354,522,023.04
  5. Step 5: Solve for x
    x = 354,522,023.04/19,005.28
  6. Step 6: Final answer
    x = 18,653.87

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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.