Home / 20,910.81-28,834.58-15,804.16

Finding the Fourth Proportional to 20,910.81, 28,834.58 and 15,804.16

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Solution

The fourth proportional to 20,910.81, 28,834.58 and 15,804.16 is: 21,792.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,910.81 : 28,834.58 = 15,804.16 : x
  2. Step 2: Convert to fraction form
    20,910.81/28,834.58 = 15,804.16/x
  3. Step 3: Cross multiply
    20,910.81x = 28,834.58 × 15,804.16
  4. Step 4: Simplify right side
    20,910.81x = 455,706,445.47
  5. Step 5: Solve for x
    x = 455,706,445.47/20,910.81
  6. Step 6: Final answer
    x = 21,792.87

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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.