Home / 15,806.83-21,804.29-10,139.57

Finding the Fourth Proportional to 15,806.83, 21,804.29 and 10,139.57

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Solution

The fourth proportional to 15,806.83, 21,804.29 and 10,139.57 is: 13,986.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,806.83 : 21,804.29 = 10,139.57 : x
  2. Step 2: Convert to fraction form
    15,806.83/21,804.29 = 10,139.57/x
  3. Step 3: Cross multiply
    15,806.83x = 21,804.29 × 10,139.57
  4. Step 4: Simplify right side
    15,806.83x = 221,086,060.09
  5. Step 5: Solve for x
    x = 221,086,060.09/15,806.83
  6. Step 6: Final answer
    x = 13,986.74

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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.