Home / 20,853.14-28,777.38-11,421.74

Finding the Fourth Proportional to 20,853.14, 28,777.38 and 11,421.74

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Solution

The fourth proportional to 20,853.14, 28,777.38 and 11,421.74 is: 15,762.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,853.14 : 28,777.38 = 11,421.74 : x
  2. Step 2: Convert to fraction form
    20,853.14/28,777.38 = 11,421.74/x
  3. Step 3: Cross multiply
    20,853.14x = 28,777.38 × 11,421.74
  4. Step 4: Simplify right side
    20,853.14x = 328,687,752.24
  5. Step 5: Solve for x
    x = 328,687,752.24/20,853.14
  6. Step 6: Final answer
    x = 15,762.03

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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.