Home / 18,386.40-25,365.68-12,800.64

Finding the Fourth Proportional to 18,386.40, 25,365.68 and 12,800.64

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Solution

The fourth proportional to 18,386.40, 25,365.68 and 12,800.64 is: 17,659.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,386.40 : 25,365.68 = 12,800.64 : x
  2. Step 2: Convert to fraction form
    18,386.40/25,365.68 = 12,800.64/x
  3. Step 3: Cross multiply
    18,386.40x = 25,365.68 × 12,800.64
  4. Step 4: Simplify right side
    18,386.40x = 324,696,938.04
  5. Step 5: Solve for x
    x = 324,696,938.04/18,386.40
  6. Step 6: Final answer
    x = 17,659.63

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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.