Home / 21,660.06-29,890.98-12,228.69

Finding the Fourth Proportional to 21,660.06, 29,890.98 and 12,228.69

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Solution

The fourth proportional to 21,660.06, 29,890.98 and 12,228.69 is: 16,875.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,660.06 : 29,890.98 = 12,228.69 : x
  2. Step 2: Convert to fraction form
    21,660.06/29,890.98 = 12,228.69/x
  3. Step 3: Cross multiply
    21,660.06x = 29,890.98 × 12,228.69
  4. Step 4: Simplify right side
    21,660.06x = 365,527,528.22
  5. Step 5: Solve for x
    x = 365,527,528.22/21,660.06
  6. Step 6: Final answer
    x = 16,875.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.