Home / 20,303.10-30,421.71-10,428.66

Finding the Fourth Proportional to 20,303.10, 30,421.71 and 10,428.66

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Solution

The fourth proportional to 20,303.10, 30,421.71 and 10,428.66 is: 15,626.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,303.10 : 30,421.71 = 10,428.66 : x
  2. Step 2: Convert to fraction form
    20,303.10/30,421.71 = 10,428.66/x
  3. Step 3: Cross multiply
    20,303.10x = 30,421.71 × 10,428.66
  4. Step 4: Simplify right side
    20,303.10x = 317,257,670.21
  5. Step 5: Solve for x
    x = 317,257,670.21/20,303.10
  6. Step 6: Final answer
    x = 15,626.07

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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.