Home / 20,590.94-28,418.00-13,428.51

Finding the Fourth Proportional to 20,590.94, 28,418.00 and 13,428.51

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Solution

The fourth proportional to 20,590.94, 28,418.00 and 13,428.51 is: 18,532.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,590.94 : 28,418.00 = 13,428.51 : x
  2. Step 2: Convert to fraction form
    20,590.94/28,418.00 = 13,428.51/x
  3. Step 3: Cross multiply
    20,590.94x = 28,418.00 × 13,428.51
  4. Step 4: Simplify right side
    20,590.94x = 381,611,330.04
  5. Step 5: Solve for x
    x = 381,611,330.04/20,590.94
  6. Step 6: Final answer
    x = 18,532.98

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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.