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Finding the Fourth Proportional to 21,411.94, 32,120.94 and 6,622.16

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Solution

The fourth proportional to 21,411.94, 32,120.94 and 6,622.16 is: 9,934.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,411.94 : 32,120.94 = 6,622.16 : x
  2. Step 2: Convert to fraction form
    21,411.94/32,120.94 = 6,622.16/x
  3. Step 3: Cross multiply
    21,411.94x = 32,120.94 × 6,622.16
  4. Step 4: Simplify right side
    21,411.94x = 212,710,004.03
  5. Step 5: Solve for x
    x = 212,710,004.03/21,411.94
  6. Step 6: Final answer
    x = 9,934.18

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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.