Home / 21,005.32-31,518.96-13,607.86

Finding the Fourth Proportional to 21,005.32, 31,518.96 and 13,607.86

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Solution

The fourth proportional to 21,005.32, 31,518.96 and 13,607.86 is: 20,418.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005.32 : 31,518.96 = 13,607.86 : x
  2. Step 2: Convert to fraction form
    21,005.32/31,518.96 = 13,607.86/x
  3. Step 3: Cross multiply
    21,005.32x = 31,518.96 × 13,607.86
  4. Step 4: Simplify right side
    21,005.32x = 428,905,595.03
  5. Step 5: Solve for x
    x = 428,905,595.03/21,005.32
  6. Step 6: Final answer
    x = 20,418.90

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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.