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Finding the Fourth Proportional to 18,764.64, 28,137.52 and 6,280.32

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Solution

The fourth proportional to 18,764.64, 28,137.52 and 6,280.32 is: 9,417.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,764.64 : 28,137.52 = 6,280.32 : x
  2. Step 2: Convert to fraction form
    18,764.64/28,137.52 = 6,280.32/x
  3. Step 3: Cross multiply
    18,764.64x = 28,137.52 × 6,280.32
  4. Step 4: Simplify right side
    18,764.64x = 176,712,629.61
  5. Step 5: Solve for x
    x = 176,712,629.61/18,764.64
  6. Step 6: Final answer
    x = 9,417.32

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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.