Home / 20,740.19-28,621.55-11,308.68

Finding the Fourth Proportional to 20,740.19, 28,621.55 and 11,308.68

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Solution

The fourth proportional to 20,740.19, 28,621.55 and 11,308.68 is: 15,606.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,740.19 : 28,621.55 = 11,308.68 : x
  2. Step 2: Convert to fraction form
    20,740.19/28,621.55 = 11,308.68/x
  3. Step 3: Cross multiply
    20,740.19x = 28,621.55 × 11,308.68
  4. Step 4: Simplify right side
    20,740.19x = 323,671,978.33
  5. Step 5: Solve for x
    x = 323,671,978.33/20,740.19
  6. Step 6: Final answer
    x = 15,606.03

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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.