Home / 20,740.40-28,622.04-11,308.96

Finding the Fourth Proportional to 20,740.40, 28,622.04 and 11,308.96

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Solution

The fourth proportional to 20,740.40, 28,622.04 and 11,308.96 is: 15,606.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,740.40 : 28,622.04 = 11,308.96 : x
  2. Step 2: Convert to fraction form
    20,740.40/28,622.04 = 11,308.96/x
  3. Step 3: Cross multiply
    20,740.40x = 28,622.04 × 11,308.96
  4. Step 4: Simplify right side
    20,740.40x = 323,685,362.37
  5. Step 5: Solve for x
    x = 323,685,362.37/20,740.40
  6. Step 6: Final answer
    x = 15,606.52

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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.