Home / 20,983.43-28,956.21-12,030.40

Finding the Fourth Proportional to 20,983.43, 28,956.21 and 12,030.40

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Solution

The fourth proportional to 20,983.43, 28,956.21 and 12,030.40 is: 16,601.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,983.43 : 28,956.21 = 12,030.40 : x
  2. Step 2: Convert to fraction form
    20,983.43/28,956.21 = 12,030.40/x
  3. Step 3: Cross multiply
    20,983.43x = 28,956.21 × 12,030.40
  4. Step 4: Simplify right side
    20,983.43x = 348,354,788.78
  5. Step 5: Solve for x
    x = 348,354,788.78/20,983.43
  6. Step 6: Final answer
    x = 16,601.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.