Home / 20,866.80-28,795.23-11,435.16

Finding the Fourth Proportional to 20,866.80, 28,795.23 and 11,435.16

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Solution

The fourth proportional to 20,866.80, 28,795.23 and 11,435.16 is: 15,780.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,866.80 : 28,795.23 = 11,435.16 : x
  2. Step 2: Convert to fraction form
    20,866.80/28,795.23 = 11,435.16/x
  3. Step 3: Cross multiply
    20,866.80x = 28,795.23 × 11,435.16
  4. Step 4: Simplify right side
    20,866.80x = 329,278,062.29
  5. Step 5: Solve for x
    x = 329,278,062.29/20,866.80
  6. Step 6: Final answer
    x = 15,780.00

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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.