Home / 20,988.28-28,965.87-15,673.87

Finding the Fourth Proportional to 20,988.28, 28,965.87 and 15,673.87

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Solution

The fourth proportional to 20,988.28, 28,965.87 and 15,673.87 is: 21,631.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,988.28 : 28,965.87 = 15,673.87 : x
  2. Step 2: Convert to fraction form
    20,988.28/28,965.87 = 15,673.87/x
  3. Step 3: Cross multiply
    20,988.28x = 28,965.87 × 15,673.87
  4. Step 4: Simplify right side
    20,988.28x = 454,007,247.59
  5. Step 5: Solve for x
    x = 454,007,247.59/20,988.28
  6. Step 6: Final answer
    x = 21,631.47

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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.