Home / 20,983.48-28,956.31-11,423.39

Finding the Fourth Proportional to 20,983.48, 28,956.31 and 11,423.39

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Solution

The fourth proportional to 20,983.48, 28,956.31 and 11,423.39 is: 15,763.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,983.48 : 28,956.31 = 11,423.39 : x
  2. Step 2: Convert to fraction form
    20,983.48/28,956.31 = 11,423.39/x
  3. Step 3: Cross multiply
    20,983.48x = 28,956.31 × 11,423.39
  4. Step 4: Simplify right side
    20,983.48x = 330,779,048.75
  5. Step 5: Solve for x
    x = 330,779,048.75/20,983.48
  6. Step 6: Final answer
    x = 15,763.79

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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.