Home / 28,362.39-39,140.09-15,790.11

Finding the Fourth Proportional to 28,362.39, 39,140.09 and 15,790.11

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Solution

The fourth proportional to 28,362.39, 39,140.09 and 15,790.11 is: 21,790.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,362.39 : 39,140.09 = 15,790.11 : x
  2. Step 2: Convert to fraction form
    28,362.39/39,140.09 = 15,790.11/x
  3. Step 3: Cross multiply
    28,362.39x = 39,140.09 × 15,790.11
  4. Step 4: Simplify right side
    28,362.39x = 618,026,247.56
  5. Step 5: Solve for x
    x = 618,026,247.56/28,362.39
  6. Step 6: Final answer
    x = 21,790.34

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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.