Home / 20,421.74-30,605.34-10,914.57

Finding the Fourth Proportional to 20,421.74, 30,605.34 and 10,914.57

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Solution

The fourth proportional to 20,421.74, 30,605.34 and 10,914.57 is: 16,357.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,421.74 : 30,605.34 = 10,914.57 : x
  2. Step 2: Convert to fraction form
    20,421.74/30,605.34 = 10,914.57/x
  3. Step 3: Cross multiply
    20,421.74x = 30,605.34 × 10,914.57
  4. Step 4: Simplify right side
    20,421.74x = 334,044,125.80
  5. Step 5: Solve for x
    x = 334,044,125.80/20,421.74
  6. Step 6: Final answer
    x = 16,357.28

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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.