Home / 15,620.49-21,555.72-9,331.65

Finding the Fourth Proportional to 15,620.49, 21,555.72 and 9,331.65

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Solution

The fourth proportional to 15,620.49, 21,555.72 and 9,331.65 is: 12,877.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,620.49 : 21,555.72 = 9,331.65 : x
  2. Step 2: Convert to fraction form
    15,620.49/21,555.72 = 9,331.65/x
  3. Step 3: Cross multiply
    15,620.49x = 21,555.72 × 9,331.65
  4. Step 4: Simplify right side
    15,620.49x = 201,150,434.54
  5. Step 5: Solve for x
    x = 201,150,434.54/15,620.49
  6. Step 6: Final answer
    x = 12,877.34

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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.