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Finding the Fourth Proportional to 21,913.60, 32,848.80 and 10,811.20

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Solution

The fourth proportional to 21,913.60, 32,848.80 and 10,811.20 is: 16,206.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,913.60 : 32,848.80 = 10,811.20 : x
  2. Step 2: Convert to fraction form
    21,913.60/32,848.80 = 10,811.20/x
  3. Step 3: Cross multiply
    21,913.60x = 32,848.80 × 10,811.20
  4. Step 4: Simplify right side
    21,913.60x = 355,134,946.56
  5. Step 5: Solve for x
    x = 355,134,946.56/21,913.60
  6. Step 6: Final answer
    x = 16,206.14

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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.