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Finding the Fourth Proportional to 14,984.16, 20,678.79 and 8,612.80

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Solution

The fourth proportional to 14,984.16, 20,678.79 and 8,612.80 is: 11,886.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,984.16 : 20,678.79 = 8,612.80 : x
  2. Step 2: Convert to fraction form
    14,984.16/20,678.79 = 8,612.80/x
  3. Step 3: Cross multiply
    14,984.16x = 20,678.79 × 8,612.80
  4. Step 4: Simplify right side
    14,984.16x = 178,102,263.11
  5. Step 5: Solve for x
    x = 178,102,263.11/14,984.16
  6. Step 6: Final answer
    x = 11,886.04

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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.