Home / 13,400.79-18,501.48-8,629.04

Finding the Fourth Proportional to 13,400.79, 18,501.48 and 8,629.04

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Solution

The fourth proportional to 13,400.79, 18,501.48 and 8,629.04 is: 11,913.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,400.79 : 18,501.48 = 8,629.04 : x
  2. Step 2: Convert to fraction form
    13,400.79/18,501.48 = 8,629.04/x
  3. Step 3: Cross multiply
    13,400.79x = 18,501.48 × 8,629.04
  4. Step 4: Simplify right side
    13,400.79x = 159,649,918.47
  5. Step 5: Solve for x
    x = 159,649,918.47/13,400.79
  6. Step 6: Final answer
    x = 11,913.47

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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.