Home / 15,112.36-20,848.26-8,821

Finding the Fourth Proportional to 15,112.36, 20,848.26 and 8,821

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Solution

The fourth proportional to 15,112.36, 20,848.26 and 8,821 is: 12,169.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,112.36 : 20,848.26 = 8,821 : x
  2. Step 2: Convert to fraction form
    15,112.36/20,848.26 = 8,821/x
  3. Step 3: Cross multiply
    15,112.36x = 20,848.26 × 8,821
  4. Step 4: Simplify right side
    15,112.36x = 183,902,501.46
  5. Step 5: Solve for x
    x = 183,902,501.46/15,112.36
  6. Step 6: Final answer
    x = 12,169.01

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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.