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Finding the Fourth Proportional to 12,114.80, 16,718.88 and 7,336.32

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Solution

The fourth proportional to 12,114.80, 16,718.88 and 7,336.32 is: 10,124.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,114.80 : 16,718.88 = 7,336.32 : x
  2. Step 2: Convert to fraction form
    12,114.80/16,718.88 = 7,336.32/x
  3. Step 3: Cross multiply
    12,114.80x = 16,718.88 × 7,336.32
  4. Step 4: Simplify right side
    12,114.80x = 122,655,053.72
  5. Step 5: Solve for x
    x = 122,655,053.72/12,114.80
  6. Step 6: Final answer
    x = 10,124.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.