Home / 20,011.78-30,036.49-10,158.13

Finding the Fourth Proportional to 20,011.78, 30,036.49 and 10,158.13

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Solution

The fourth proportional to 20,011.78, 30,036.49 and 10,158.13 is: 15,246.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,011.78 : 30,036.49 = 10,158.13 : x
  2. Step 2: Convert to fraction form
    20,011.78/30,036.49 = 10,158.13/x
  3. Step 3: Cross multiply
    20,011.78x = 30,036.49 × 10,158.13
  4. Step 4: Simplify right side
    20,011.78x = 305,114,570.16
  5. Step 5: Solve for x
    x = 305,114,570.16/20,011.78
  6. Step 6: Final answer
    x = 15,246.75

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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.