Home / 20,660.86-28,510.68-11,708.74

Finding the Fourth Proportional to 20,660.86, 28,510.68 and 11,708.74

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Solution

The fourth proportional to 20,660.86, 28,510.68 and 11,708.74 is: 16,157.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,660.86 : 28,510.68 = 11,708.74 : x
  2. Step 2: Convert to fraction form
    20,660.86/28,510.68 = 11,708.74/x
  3. Step 3: Cross multiply
    20,660.86x = 28,510.68 × 11,708.74
  4. Step 4: Simplify right side
    20,660.86x = 333,824,139.34
  5. Step 5: Solve for x
    x = 333,824,139.34/20,660.86
  6. Step 6: Final answer
    x = 16,157.32

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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.