Home / 20,703.07-28,570.35-11,271.88

Finding the Fourth Proportional to 20,703.07, 28,570.35 and 11,271.88

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Solution

The fourth proportional to 20,703.07, 28,570.35 and 11,271.88 is: 15,555.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,703.07 : 28,570.35 = 11,271.88 : x
  2. Step 2: Convert to fraction form
    20,703.07/28,570.35 = 11,271.88/x
  3. Step 3: Cross multiply
    20,703.07x = 28,570.35 × 11,271.88
  4. Step 4: Simplify right side
    20,703.07x = 322,041,556.76
  5. Step 5: Solve for x
    x = 322,041,556.76/20,703.07
  6. Step 6: Final answer
    x = 15,555.26

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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.