Home / 21,000.60-31,452.30-13,127.40

Finding the Fourth Proportional to 21,000.60, 31,452.30 and 13,127.40

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Solution

The fourth proportional to 21,000.60, 31,452.30 and 13,127.40 is: 19,660.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,000.60 : 31,452.30 = 13,127.40 : x
  2. Step 2: Convert to fraction form
    21,000.60/31,452.30 = 13,127.40/x
  3. Step 3: Cross multiply
    21,000.60x = 31,452.30 × 13,127.40
  4. Step 4: Simplify right side
    21,000.60x = 412,886,923.02
  5. Step 5: Solve for x
    x = 412,886,923.02/21,000.60
  6. Step 6: Final answer
    x = 19,660.72

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1.5x scale

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.