Home / 20,457.40-30,686.10-7,310.20

Finding the Fourth Proportional to 20,457.40, 30,686.10 and 7,310.20

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Solution

The fourth proportional to 20,457.40, 30,686.10 and 7,310.20 is: 10,965.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,457.40 : 30,686.10 = 7,310.20 : x
  2. Step 2: Convert to fraction form
    20,457.40/30,686.10 = 7,310.20/x
  3. Step 3: Cross multiply
    20,457.40x = 30,686.10 × 7,310.20
  4. Step 4: Simplify right side
    20,457.40x = 224,321,528.22
  5. Step 5: Solve for x
    x = 224,321,528.22/20,457.40
  6. Step 6: Final answer
    x = 10,965.30

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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.