Home / 20,153.90-30,206.55-10,288.10

Finding the Fourth Proportional to 20,153.90, 30,206.55 and 10,288.10

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Solution

The fourth proportional to 20,153.90, 30,206.55 and 10,288.10 is: 15,419.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,153.90 : 30,206.55 = 10,288.10 : x
  2. Step 2: Convert to fraction form
    20,153.90/30,206.55 = 10,288.10/x
  3. Step 3: Cross multiply
    20,153.90x = 30,206.55 × 10,288.10
  4. Step 4: Simplify right side
    20,153.90x = 310,768,007.06
  5. Step 5: Solve for x
    x = 310,768,007.06/20,153.90
  6. Step 6: Final answer
    x = 15,419.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.