Home / 19,870.29-27,418.80-15,889.95

Finding the Fourth Proportional to 19,870.29, 27,418.80 and 15,889.95

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Solution

The fourth proportional to 19,870.29, 27,418.80 and 15,889.95 is: 21,926.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,870.29 : 27,418.80 = 15,889.95 : x
  2. Step 2: Convert to fraction form
    19,870.29/27,418.80 = 15,889.95/x
  3. Step 3: Cross multiply
    19,870.29x = 27,418.80 × 15,889.95
  4. Step 4: Simplify right side
    19,870.29x = 435,683,361.06
  5. Step 5: Solve for x
    x = 435,683,361.06/19,870.29
  6. Step 6: Final answer
    x = 21,926.37

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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.