Home / 21,364.60-31,998.30-10,964.20

Finding the Fourth Proportional to 21,364.60, 31,998.30 and 10,964.20

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Solution

The fourth proportional to 21,364.60, 31,998.30 and 10,964.20 is: 16,421.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,364.60 : 31,998.30 = 10,964.20 : x
  2. Step 2: Convert to fraction form
    21,364.60/31,998.30 = 10,964.20/x
  3. Step 3: Cross multiply
    21,364.60x = 31,998.30 × 10,964.20
  4. Step 4: Simplify right side
    21,364.60x = 350,835,760.86
  5. Step 5: Solve for x
    x = 350,835,760.86/21,364.60
  6. Step 6: Final answer
    x = 16,421.36

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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.