Home / 13,688.49-18,873.00-11,423.08

Finding the Fourth Proportional to 13,688.49, 18,873.00 and 11,423.08

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Solution

The fourth proportional to 13,688.49, 18,873.00 and 11,423.08 is: 15,749.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,688.49 : 18,873.00 = 11,423.08 : x
  2. Step 2: Convert to fraction form
    13,688.49/18,873.00 = 11,423.08/x
  3. Step 3: Cross multiply
    13,688.49x = 18,873.00 × 11,423.08
  4. Step 4: Simplify right side
    13,688.49x = 215,587,760.28
  5. Step 5: Solve for x
    x = 215,587,760.28/13,688.49
  6. Step 6: Final answer
    x = 15,749.57

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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.