Home / 19,870.49-27,422.94-10,919.78

Finding the Fourth Proportional to 19,870.49, 27,422.94 and 10,919.78

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Solution

The fourth proportional to 19,870.49, 27,422.94 and 10,919.78 is: 15,070.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,870.49 : 27,422.94 = 10,919.78 : x
  2. Step 2: Convert to fraction form
    19,870.49/27,422.94 = 10,919.78/x
  3. Step 3: Cross multiply
    19,870.49x = 27,422.94 × 10,919.78
  4. Step 4: Simplify right side
    19,870.49x = 299,452,334.64
  5. Step 5: Solve for x
    x = 299,452,334.64/19,870.49
  6. Step 6: Final answer
    x = 15,070.21

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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.