Home / 13,715.20-18,929.60-8,051.20

Finding the Fourth Proportional to 13,715.20, 18,929.60 and 8,051.20

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Solution

The fourth proportional to 13,715.20, 18,929.60 and 8,051.20 is: 11,112.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,715.20 : 18,929.60 = 8,051.20 : x
  2. Step 2: Convert to fraction form
    13,715.20/18,929.60 = 8,051.20/x
  3. Step 3: Cross multiply
    13,715.20x = 18,929.60 × 8,051.20
  4. Step 4: Simplify right side
    13,715.20x = 152,405,995.52
  5. Step 5: Solve for x
    x = 152,405,995.52/13,715.20
  6. Step 6: Final answer
    x = 11,112.20

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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.