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Finding the Fourth Proportional to 19,322.22, 28,966.58 and 8,640.48

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Solution

The fourth proportional to 19,322.22, 28,966.58 and 8,640.48 is: 12,953.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,322.22 : 28,966.58 = 8,640.48 : x
  2. Step 2: Convert to fraction form
    19,322.22/28,966.58 = 8,640.48/x
  3. Step 3: Cross multiply
    19,322.22x = 28,966.58 × 8,640.48
  4. Step 4: Simplify right side
    19,322.22x = 250,285,155.16
  5. Step 5: Solve for x
    x = 250,285,155.16/19,322.22
  6. Step 6: Final answer
    x = 12,953.23

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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.