Home / 20,963.84-28,936.85-13,430.43

Finding the Fourth Proportional to 20,963.84, 28,936.85 and 13,430.43

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Solution

The fourth proportional to 20,963.84, 28,936.85 and 13,430.43 is: 18,538.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,963.84 : 28,936.85 = 13,430.43 : x
  2. Step 2: Convert to fraction form
    20,963.84/28,936.85 = 13,430.43/x
  3. Step 3: Cross multiply
    20,963.84x = 28,936.85 × 13,430.43
  4. Step 4: Simplify right side
    20,963.84x = 388,634,271.19
  5. Step 5: Solve for x
    x = 388,634,271.19/20,963.84
  6. Step 6: Final answer
    x = 18,538.32

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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.