Home / 13,688.16-18,889.66-7,400.54

Finding the Fourth Proportional to 13,688.16, 18,889.66 and 7,400.54

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Solution

The fourth proportional to 13,688.16, 18,889.66 and 7,400.54 is: 10,212.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,688.16 : 18,889.66 = 7,400.54 : x
  2. Step 2: Convert to fraction form
    13,688.16/18,889.66 = 7,400.54/x
  3. Step 3: Cross multiply
    13,688.16x = 18,889.66 × 7,400.54
  4. Step 4: Simplify right side
    13,688.16x = 139,793,684.42
  5. Step 5: Solve for x
    x = 139,793,684.42/13,688.16
  6. Step 6: Final answer
    x = 10,212.74

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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.