Home / 13,688.04-18,889.56-7,719.96

Finding the Fourth Proportional to 13,688.04, 18,889.56 and 7,719.96

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Solution

The fourth proportional to 13,688.04, 18,889.56 and 7,719.96 is: 10,653.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,688.04 : 18,889.56 = 7,719.96 : x
  2. Step 2: Convert to fraction form
    13,688.04/18,889.56 = 7,719.96/x
  3. Step 3: Cross multiply
    13,688.04x = 18,889.56 × 7,719.96
  4. Step 4: Simplify right side
    13,688.04x = 145,826,647.62
  5. Step 5: Solve for x
    x = 145,826,647.62/13,688.04
  6. Step 6: Final answer
    x = 10,653.58

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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.