Home / 20,066.40-30,118.10-10,212.75

Finding the Fourth Proportional to 20,066.40, 30,118.10 and 10,212.75

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Solution

The fourth proportional to 20,066.40, 30,118.10 and 10,212.75 is: 15,328.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,066.40 : 30,118.10 = 10,212.75 : x
  2. Step 2: Convert to fraction form
    20,066.40/30,118.10 = 10,212.75/x
  3. Step 3: Cross multiply
    20,066.40x = 30,118.10 × 10,212.75
  4. Step 4: Simplify right side
    20,066.40x = 307,588,574.71
  5. Step 5: Solve for x
    x = 307,588,574.71/20,066.40
  6. Step 6: Final answer
    x = 15,328.54

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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.