Home / 20,882.69-28,818.11-11,451.45

Finding the Fourth Proportional to 20,882.69, 28,818.11 and 11,451.45

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Solution

The fourth proportional to 20,882.69, 28,818.11 and 11,451.45 is: 15,803.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,882.69 : 28,818.11 = 11,451.45 : x
  2. Step 2: Convert to fraction form
    20,882.69/28,818.11 = 11,451.45/x
  3. Step 3: Cross multiply
    20,882.69x = 28,818.11 × 11,451.45
  4. Step 4: Simplify right side
    20,882.69x = 330,009,145.76
  5. Step 5: Solve for x
    x = 330,009,145.76/20,882.69
  6. Step 6: Final answer
    x = 15,803.00

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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.