Home / 21,787.79-32,668.52-9,777.77

Finding the Fourth Proportional to 21,787.79, 32,668.52 and 9,777.77

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Solution

The fourth proportional to 21,787.79, 32,668.52 and 9,777.77 is: 14,660.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,787.79 : 32,668.52 = 9,777.77 : x
  2. Step 2: Convert to fraction form
    21,787.79/32,668.52 = 9,777.77/x
  3. Step 3: Cross multiply
    21,787.79x = 32,668.52 × 9,777.77
  4. Step 4: Simplify right side
    21,787.79x = 319,425,062.57
  5. Step 5: Solve for x
    x = 319,425,062.57/21,787.79
  6. Step 6: Final answer
    x = 14,660.74

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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.