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Finding the Fourth Proportional to 18,804.16, 28,205.19 and 7,710.40

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Solution

The fourth proportional to 18,804.16, 28,205.19 and 7,710.40 is: 11,565.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,804.16 : 28,205.19 = 7,710.40 : x
  2. Step 2: Convert to fraction form
    18,804.16/28,205.19 = 7,710.40/x
  3. Step 3: Cross multiply
    18,804.16x = 28,205.19 × 7,710.40
  4. Step 4: Simplify right side
    18,804.16x = 217,473,296.98
  5. Step 5: Solve for x
    x = 217,473,296.98/18,804.16
  6. Step 6: Final answer
    x = 11,565.17

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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.