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Finding the Fourth Proportional to 18,804.60, 28,206.10 and 7,707.64

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Solution

The fourth proportional to 18,804.60, 28,206.10 and 7,707.64 is: 11,561.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,804.60 : 28,206.10 = 7,707.64 : x
  2. Step 2: Convert to fraction form
    18,804.60/28,206.10 = 7,707.64/x
  3. Step 3: Cross multiply
    18,804.60x = 28,206.10 × 7,707.64
  4. Step 4: Simplify right side
    18,804.60x = 217,402,464.60
  5. Step 5: Solve for x
    x = 217,402,464.60/18,804.60
  6. Step 6: Final answer
    x = 11,561.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.