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Finding the Fourth Proportional to 18,712.71, 28,070.28 and 5,563.98

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Solution

The fourth proportional to 18,712.71, 28,070.28 and 5,563.98 is: 8,346.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,712.71 : 28,070.28 = 5,563.98 : x
  2. Step 2: Convert to fraction form
    18,712.71/28,070.28 = 5,563.98/x
  3. Step 3: Cross multiply
    18,712.71x = 28,070.28 × 5,563.98
  4. Step 4: Simplify right side
    18,712.71x = 156,182,476.51
  5. Step 5: Solve for x
    x = 156,182,476.51/18,712.71
  6. Step 6: Final answer
    x = 8,346.33

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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.