Home / 20,486.05-28,271.28-11,533.88

Finding the Fourth Proportional to 20,486.05, 28,271.28 and 11,533.88

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Solution

The fourth proportional to 20,486.05, 28,271.28 and 11,533.88 is: 15,917.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,486.05 : 28,271.28 = 11,533.88 : x
  2. Step 2: Convert to fraction form
    20,486.05/28,271.28 = 11,533.88/x
  3. Step 3: Cross multiply
    20,486.05x = 28,271.28 × 11,533.88
  4. Step 4: Simplify right side
    20,486.05x = 326,077,440.99
  5. Step 5: Solve for x
    x = 326,077,440.99/20,486.05
  6. Step 6: Final answer
    x = 15,917.05

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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.