Home / 20,598.40-28,434.24-12,215.68

Finding the Fourth Proportional to 20,598.40, 28,434.24 and 12,215.68

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Solution

The fourth proportional to 20,598.40, 28,434.24 and 12,215.68 is: 16,862.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,598.40 : 28,434.24 = 12,215.68 : x
  2. Step 2: Convert to fraction form
    20,598.40/28,434.24 = 12,215.68/x
  3. Step 3: Cross multiply
    20,598.40x = 28,434.24 × 12,215.68
  4. Step 4: Simplify right side
    20,598.40x = 347,343,576.88
  5. Step 5: Solve for x
    x = 347,343,576.88/20,598.40
  6. Step 6: Final answer
    x = 16,862.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.