Home / 21,013.48-31,504.78-9,913.92

Finding the Fourth Proportional to 21,013.48, 31,504.78 and 9,913.92

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Solution

The fourth proportional to 21,013.48, 31,504.78 and 9,913.92 is: 14,863.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,013.48 : 31,504.78 = 9,913.92 : x
  2. Step 2: Convert to fraction form
    21,013.48/31,504.78 = 9,913.92/x
  3. Step 3: Cross multiply
    21,013.48x = 31,504.78 × 9,913.92
  4. Step 4: Simplify right side
    21,013.48x = 312,335,868.54
  5. Step 5: Solve for x
    x = 312,335,868.54/21,013.48
  6. Step 6: Final answer
    x = 14,863.60

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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.