Home / 20,730.24-31,075.20-10,310.40

Finding the Fourth Proportional to 20,730.24, 31,075.20 and 10,310.40

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Solution

The fourth proportional to 20,730.24, 31,075.20 and 10,310.40 is: 15,455.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,730.24 : 31,075.20 = 10,310.40 : x
  2. Step 2: Convert to fraction form
    20,730.24/31,075.20 = 10,310.40/x
  3. Step 3: Cross multiply
    20,730.24x = 31,075.20 × 10,310.40
  4. Step 4: Simplify right side
    20,730.24x = 320,397,742.08
  5. Step 5: Solve for x
    x = 320,397,742.08/20,730.24
  6. Step 6: Final answer
    x = 15,455.57

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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.