Home / 15,420.14-21,279.81-8,346.54

Finding the Fourth Proportional to 15,420.14, 21,279.81 and 8,346.54

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Solution

The fourth proportional to 15,420.14, 21,279.81 and 8,346.54 is: 11,518.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,420.14 : 21,279.81 = 8,346.54 : x
  2. Step 2: Convert to fraction form
    15,420.14/21,279.81 = 8,346.54/x
  3. Step 3: Cross multiply
    15,420.14x = 21,279.81 × 8,346.54
  4. Step 4: Simplify right side
    15,420.14x = 177,612,785.36
  5. Step 5: Solve for x
    x = 177,612,785.36/15,420.14
  6. Step 6: Final answer
    x = 11,518.24

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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.