Home / 28,139.14-38,830.38-15,389.94

Finding the Fourth Proportional to 28,139.14, 38,830.38 and 15,389.94

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Solution

The fourth proportional to 28,139.14, 38,830.38 and 15,389.94 is: 21,237.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,139.14 : 38,830.38 = 15,389.94 : x
  2. Step 2: Convert to fraction form
    28,139.14/38,830.38 = 15,389.94/x
  3. Step 3: Cross multiply
    28,139.14x = 38,830.38 × 15,389.94
  4. Step 4: Simplify right side
    28,139.14x = 597,597,160.66
  5. Step 5: Solve for x
    x = 597,597,160.66/28,139.14
  6. Step 6: Final answer
    x = 21,237.22

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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.