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Finding the Fourth Proportional to 18,813.63, 28,221.04 and 6,970.35

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Solution

The fourth proportional to 18,813.63, 28,221.04 and 6,970.35 is: 10,455.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,813.63 : 28,221.04 = 6,970.35 : x
  2. Step 2: Convert to fraction form
    18,813.63/28,221.04 = 6,970.35/x
  3. Step 3: Cross multiply
    18,813.63x = 28,221.04 × 6,970.35
  4. Step 4: Simplify right side
    18,813.63x = 196,710,640.71
  5. Step 5: Solve for x
    x = 196,710,640.71/18,813.63
  6. Step 6: Final answer
    x = 10,455.75

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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.