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Finding the Fourth Proportional to 18,726.16, 28,065.84 and 9,368.86

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Solution

The fourth proportional to 18,726.16, 28,065.84 and 9,368.86 is: 14,041.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,726.16 : 28,065.84 = 9,368.86 : x
  2. Step 2: Convert to fraction form
    18,726.16/28,065.84 = 9,368.86/x
  3. Step 3: Cross multiply
    18,726.16x = 28,065.84 × 9,368.86
  4. Step 4: Simplify right side
    18,726.16x = 262,944,925.74
  5. Step 5: Solve for x
    x = 262,944,925.74/18,726.16
  6. Step 6: Final answer
    x = 14,041.58

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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.