Home / 21,660.10-29,890.65-12,228.85

Finding the Fourth Proportional to 21,660.10, 29,890.65 and 12,228.85

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Solution

The fourth proportional to 21,660.10, 29,890.65 and 12,228.85 is: 16,875.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,660.10 : 29,890.65 = 12,228.85 : x
  2. Step 2: Convert to fraction form
    21,660.10/29,890.65 = 12,228.85/x
  3. Step 3: Cross multiply
    21,660.10x = 29,890.65 × 12,228.85
  4. Step 4: Simplify right side
    21,660.10x = 365,528,275.25
  5. Step 5: Solve for x
    x = 365,528,275.25/21,660.10
  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.