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Finding the Fourth Proportional to 21,957.40, 32,946.90 and 16,690.60

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Solution

The fourth proportional to 21,957.40, 32,946.90 and 16,690.60 is: 25,044.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,957.40 : 32,946.90 = 16,690.60 : x
  2. Step 2: Convert to fraction form
    21,957.40/32,946.90 = 16,690.60/x
  3. Step 3: Cross multiply
    21,957.40x = 32,946.90 × 16,690.60
  4. Step 4: Simplify right side
    21,957.40x = 549,903,529.14
  5. Step 5: Solve for x
    x = 549,903,529.14/21,957.40
  6. Step 6: Final answer
    x = 25,044.11

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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.