Home / 13,608.47-18,781.07-7,639.79

Finding the Fourth Proportional to 13,608.47, 18,781.07 and 7,639.79

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Solution

The fourth proportional to 13,608.47, 18,781.07 and 7,639.79 is: 10,543.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,608.47 : 18,781.07 = 7,639.79 : x
  2. Step 2: Convert to fraction form
    13,608.47/18,781.07 = 7,639.79/x
  3. Step 3: Cross multiply
    13,608.47x = 18,781.07 × 7,639.79
  4. Step 4: Simplify right side
    13,608.47x = 143,483,298.67
  5. Step 5: Solve for x
    x = 143,483,298.67/13,608.47
  6. Step 6: Final answer
    x = 10,543.67

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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.