Home / 20,931.49-28,884.63-11,499.04

Finding the Fourth Proportional to 20,931.49, 28,884.63 and 11,499.04

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Solution

The fourth proportional to 20,931.49, 28,884.63 and 11,499.04 is: 15,868.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,931.49 : 28,884.63 = 11,499.04 : x
  2. Step 2: Convert to fraction form
    20,931.49/28,884.63 = 11,499.04/x
  3. Step 3: Cross multiply
    20,931.49x = 28,884.63 × 11,499.04
  4. Step 4: Simplify right side
    20,931.49x = 332,145,515.76
  5. Step 5: Solve for x
    x = 332,145,515.76/20,931.49
  6. Step 6: Final answer
    x = 15,868.22

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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.