Home / 20,678.04-28,535.40-11,246.40

Finding the Fourth Proportional to 20,678.04, 28,535.40 and 11,246.40

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Solution

The fourth proportional to 20,678.04, 28,535.40 and 11,246.40 is: 15,519.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,678.04 : 28,535.40 = 11,246.40 : x
  2. Step 2: Convert to fraction form
    20,678.04/28,535.40 = 11,246.40/x
  3. Step 3: Cross multiply
    20,678.04x = 28,535.40 × 11,246.40
  4. Step 4: Simplify right side
    20,678.04x = 320,920,522.56
  5. Step 5: Solve for x
    x = 320,920,522.56/20,678.04
  6. Step 6: Final answer
    x = 15,519.87

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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.