Home / 15,390.01-21,245.93-11,979.51

Finding the Fourth Proportional to 15,390.01, 21,245.93 and 11,979.51

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Solution

The fourth proportional to 15,390.01, 21,245.93 and 11,979.51 is: 16,537.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,390.01 : 21,245.93 = 11,979.51 : x
  2. Step 2: Convert to fraction form
    15,390.01/21,245.93 = 11,979.51/x
  3. Step 3: Cross multiply
    15,390.01x = 21,245.93 × 11,979.51
  4. Step 4: Simplify right side
    15,390.01x = 254,515,830.89
  5. Step 5: Solve for x
    x = 254,515,830.89/15,390.01
  6. Step 6: Final answer
    x = 16,537.73

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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.