Home / 20,315.38-28,030.17-12,762.94

Finding the Fourth Proportional to 20,315.38, 28,030.17 and 12,762.94

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Solution

The fourth proportional to 20,315.38, 28,030.17 and 12,762.94 is: 17,609.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,315.38 : 28,030.17 = 12,762.94 : x
  2. Step 2: Convert to fraction form
    20,315.38/28,030.17 = 12,762.94/x
  3. Step 3: Cross multiply
    20,315.38x = 28,030.17 × 12,762.94
  4. Step 4: Simplify right side
    20,315.38x = 357,747,377.90
  5. Step 5: Solve for x
    x = 357,747,377.90/20,315.38
  6. Step 6: Final answer
    x = 17,609.68

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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.