Home / 20,740.56-28,622.16-11,309.28

Finding the Fourth Proportional to 20,740.56, 28,622.16 and 11,309.28

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Solution

The fourth proportional to 20,740.56, 28,622.16 and 11,309.28 is: 15,606.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,740.56 : 28,622.16 = 11,309.28 : x
  2. Step 2: Convert to fraction form
    20,740.56/28,622.16 = 11,309.28/x
  3. Step 3: Cross multiply
    20,740.56x = 28,622.16 × 11,309.28
  4. Step 4: Simplify right side
    20,740.56x = 323,696,021.64
  5. Step 5: Solve for x
    x = 323,696,021.64/20,740.56
  6. Step 6: Final answer
    x = 15,606.91

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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.