Home / 18,765.12-25,889.28-11,685.68

Finding the Fourth Proportional to 18,765.12, 25,889.28 and 11,685.68

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Solution

The fourth proportional to 18,765.12, 25,889.28 and 11,685.68 is: 16,122.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,765.12 : 25,889.28 = 11,685.68 : x
  2. Step 2: Convert to fraction form
    18,765.12/25,889.28 = 11,685.68/x
  3. Step 3: Cross multiply
    18,765.12x = 25,889.28 × 11,685.68
  4. Step 4: Simplify right side
    18,765.12x = 302,533,841.51
  5. Step 5: Solve for x
    x = 302,533,841.51/18,765.12
  6. Step 6: Final answer
    x = 16,122.14

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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.