Home / 20,885.81-31,272.21-15,296.81

Finding the Fourth Proportional to 20,885.81, 31,272.21 and 15,296.81

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Solution

The fourth proportional to 20,885.81, 31,272.21 and 15,296.81 is: 22,903.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,885.81 : 31,272.21 = 15,296.81 : x
  2. Step 2: Convert to fraction form
    20,885.81/31,272.21 = 15,296.81/x
  3. Step 3: Cross multiply
    20,885.81x = 31,272.21 × 15,296.81
  4. Step 4: Simplify right side
    20,885.81x = 478,364,898.29
  5. Step 5: Solve for x
    x = 478,364,898.29/20,885.81
  6. Step 6: Final answer
    x = 22,903.83

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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.