Home / 20,659.86-28,509.30-11,707.74

Finding the Fourth Proportional to 20,659.86, 28,509.30 and 11,707.74

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Solution

The fourth proportional to 20,659.86, 28,509.30 and 11,707.74 is: 16,155.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,659.86 : 28,509.30 = 11,707.74 : x
  2. Step 2: Convert to fraction form
    20,659.86/28,509.30 = 11,707.74/x
  3. Step 3: Cross multiply
    20,659.86x = 28,509.30 × 11,707.74
  4. Step 4: Simplify right side
    20,659.86x = 333,779,471.98
  5. Step 5: Solve for x
    x = 333,779,471.98/20,659.86
  6. Step 6: Final answer
    x = 16,155.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.