Home / 20,688.41-28,519.40-16,145.94

Finding the Fourth Proportional to 20,688.41, 28,519.40 and 16,145.94

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Solution

The fourth proportional to 20,688.41, 28,519.40 and 16,145.94 is: 22,257.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,688.41 : 28,519.40 = 16,145.94 : x
  2. Step 2: Convert to fraction form
    20,688.41/28,519.40 = 16,145.94/x
  3. Step 3: Cross multiply
    20,688.41x = 28,519.40 × 16,145.94
  4. Step 4: Simplify right side
    20,688.41x = 460,472,440.51
  5. Step 5: Solve for x
    x = 460,472,440.51/20,688.41
  6. Step 6: Final answer
    x = 22,257.51

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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.