Home / 21,591.50-29,810.97-13,528.49

Finding the Fourth Proportional to 21,591.50, 29,810.97 and 13,528.49

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Solution

The fourth proportional to 21,591.50, 29,810.97 and 13,528.49 is: 18,678.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,591.50 : 29,810.97 = 13,528.49 : x
  2. Step 2: Convert to fraction form
    21,591.50/29,810.97 = 13,528.49/x
  3. Step 3: Cross multiply
    21,591.50x = 29,810.97 × 13,528.49
  4. Step 4: Simplify right side
    21,591.50x = 403,297,260.48
  5. Step 5: Solve for x
    x = 403,297,260.48/21,591.50
  6. Step 6: Final answer
    x = 18,678.52

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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.