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Finding the Fourth Proportional to 18,730.51, 28,109.59 and 8,869.77

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Solution

The fourth proportional to 18,730.51, 28,109.59 and 8,869.77 is: 13,311.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,730.51 : 28,109.59 = 8,869.77 : x
  2. Step 2: Convert to fraction form
    18,730.51/28,109.59 = 8,869.77/x
  3. Step 3: Cross multiply
    18,730.51x = 28,109.59 × 8,869.77
  4. Step 4: Simplify right side
    18,730.51x = 249,325,575.92
  5. Step 5: Solve for x
    x = 249,325,575.92/18,730.51
  6. Step 6: Final answer
    x = 13,311.20

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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.