Home / 21,043.16-31,564.68-12,271.92

Finding the Fourth Proportional to 21,043.16, 31,564.68 and 12,271.92

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Solution

The fourth proportional to 21,043.16, 31,564.68 and 12,271.92 is: 18,407.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,043.16 : 31,564.68 = 12,271.92 : x
  2. Step 2: Convert to fraction form
    21,043.16/31,564.68 = 12,271.92/x
  3. Step 3: Cross multiply
    21,043.16x = 31,564.68 × 12,271.92
  4. Step 4: Simplify right side
    21,043.16x = 387,359,227.79
  5. Step 5: Solve for x
    x = 387,359,227.79/21,043.16
  6. Step 6: Final answer
    x = 18,407.85

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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.