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Finding the Fourth Proportional to 18,585.76, 25,639.68 and 11,509.60

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Solution

The fourth proportional to 18,585.76, 25,639.68 and 11,509.60 is: 15,877.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,585.76 : 25,639.68 = 11,509.60 : x
  2. Step 2: Convert to fraction form
    18,585.76/25,639.68 = 11,509.60/x
  3. Step 3: Cross multiply
    18,585.76x = 25,639.68 × 11,509.60
  4. Step 4: Simplify right side
    18,585.76x = 295,102,460.93
  5. Step 5: Solve for x
    x = 295,102,460.93/18,585.76
  6. Step 6: Final answer
    x = 15,877.88

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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.