Home / 21,007.32-31,521.96-13,609.86

Finding the Fourth Proportional to 21,007.32, 31,521.96 and 13,609.86

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Solution

The fourth proportional to 21,007.32, 31,521.96 and 13,609.86 is: 20,421.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,007.32 : 31,521.96 = 13,609.86 : x
  2. Step 2: Convert to fraction form
    21,007.32/31,521.96 = 13,609.86/x
  3. Step 3: Cross multiply
    21,007.32x = 31,521.96 × 13,609.86
  4. Step 4: Simplify right side
    21,007.32x = 429,009,462.53
  5. Step 5: Solve for x
    x = 429,009,462.53/21,007.32
  6. Step 6: Final answer
    x = 20,421.90

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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.