Home / 21,929.60-32,905.20-8,782.40

Finding the Fourth Proportional to 21,929.60, 32,905.20 and 8,782.40

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Solution

The fourth proportional to 21,929.60, 32,905.20 and 8,782.40 is: 13,177.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,929.60 : 32,905.20 = 8,782.40 : x
  2. Step 2: Convert to fraction form
    21,929.60/32,905.20 = 8,782.40/x
  3. Step 3: Cross multiply
    21,929.60x = 32,905.20 × 8,782.40
  4. Step 4: Simplify right side
    21,929.60x = 288,986,628.48
  5. Step 5: Solve for x
    x = 288,986,628.48/21,929.60
  6. Step 6: Final answer
    x = 13,177.93

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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.