Home / 20,658.05-28,510.70-11,708.45

Finding the Fourth Proportional to 20,658.05, 28,510.70 and 11,708.45

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Solution

The fourth proportional to 20,658.05, 28,510.70 and 11,708.45 is: 16,159.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,658.05 : 28,510.70 = 11,708.45 : x
  2. Step 2: Convert to fraction form
    20,658.05/28,510.70 = 11,708.45/x
  3. Step 3: Cross multiply
    20,658.05x = 28,510.70 × 11,708.45
  4. Step 4: Simplify right side
    20,658.05x = 333,815,904.32
  5. Step 5: Solve for x
    x = 333,815,904.32/20,658.05
  6. Step 6: Final answer
    x = 16,159.12

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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.