Home / 21,055.09-31,565.86-12,160.30

Finding the Fourth Proportional to 21,055.09, 31,565.86 and 12,160.30

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Solution

The fourth proportional to 21,055.09, 31,565.86 and 12,160.30 is: 18,230.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,055.09 : 31,565.86 = 12,160.30 : x
  2. Step 2: Convert to fraction form
    21,055.09/31,565.86 = 12,160.30/x
  3. Step 3: Cross multiply
    21,055.09x = 31,565.86 × 12,160.30
  4. Step 4: Simplify right side
    21,055.09x = 383,850,327.36
  5. Step 5: Solve for x
    x = 383,850,327.36/21,055.09
  6. Step 6: Final answer
    x = 18,230.76

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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.