Home / 19,830.21-27,366.45-10,878.09

Finding the Fourth Proportional to 19,830.21, 27,366.45 and 10,878.09

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Solution

The fourth proportional to 19,830.21, 27,366.45 and 10,878.09 is: 15,012.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,830.21 : 27,366.45 = 10,878.09 : x
  2. Step 2: Convert to fraction form
    19,830.21/27,366.45 = 10,878.09/x
  3. Step 3: Cross multiply
    19,830.21x = 27,366.45 × 10,878.09
  4. Step 4: Simplify right side
    19,830.21x = 297,694,706.08
  5. Step 5: Solve for x
    x = 297,694,706.08/19,830.21
  6. Step 6: Final answer
    x = 15,012.18

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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.