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Finding the Fourth Proportional to 14,929.22, 20,602.94 and 8,215.28

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Solution

The fourth proportional to 14,929.22, 20,602.94 and 8,215.28 is: 11,337.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,929.22 : 20,602.94 = 8,215.28 : x
  2. Step 2: Convert to fraction form
    14,929.22/20,602.94 = 8,215.28/x
  3. Step 3: Cross multiply
    14,929.22x = 20,602.94 × 8,215.28
  4. Step 4: Simplify right side
    14,929.22x = 169,258,776.83
  5. Step 5: Solve for x
    x = 169,258,776.83/14,929.22
  6. Step 6: Final answer
    x = 11,337.42

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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.