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Finding the Fourth Proportional to 19,005.60, 28,508.40 and 18,811.20

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Solution

The fourth proportional to 19,005.60, 28,508.40 and 18,811.20 is: 28,216.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,005.60 : 28,508.40 = 18,811.20 : x
  2. Step 2: Convert to fraction form
    19,005.60/28,508.40 = 18,811.20/x
  3. Step 3: Cross multiply
    19,005.60x = 28,508.40 × 18,811.20
  4. Step 4: Simplify right side
    19,005.60x = 536,277,214.08
  5. Step 5: Solve for x
    x = 536,277,214.08/19,005.60
  6. Step 6: Final answer
    x = 28,216.80

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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.