Home / 20,579.85-28,389.75-13,013.43

Finding the Fourth Proportional to 20,579.85, 28,389.75 and 13,013.43

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Solution

The fourth proportional to 20,579.85, 28,389.75 and 13,013.43 is: 17,951.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,579.85 : 28,389.75 = 13,013.43 : x
  2. Step 2: Convert to fraction form
    20,579.85/28,389.75 = 13,013.43/x
  3. Step 3: Cross multiply
    20,579.85x = 28,389.75 × 13,013.43
  4. Step 4: Simplify right side
    20,579.85x = 369,448,024.34
  5. Step 5: Solve for x
    x = 369,448,024.34/20,579.85
  6. Step 6: Final answer
    x = 17,951.93

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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.