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Finding the Fourth Proportional to 21,957.20, 32,935.80 and 6,376.40

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Solution

The fourth proportional to 21,957.20, 32,935.80 and 6,376.40 is: 9,564.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,957.20 : 32,935.80 = 6,376.40 : x
  2. Step 2: Convert to fraction form
    21,957.20/32,935.80 = 6,376.40/x
  3. Step 3: Cross multiply
    21,957.20x = 32,935.80 × 6,376.40
  4. Step 4: Simplify right side
    21,957.20x = 210,011,835.12
  5. Step 5: Solve for x
    x = 210,011,835.12/21,957.20
  6. Step 6: Final answer
    x = 9,564.60

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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.