Home / 20,882.40-28,818.28-11,931.36

Finding the Fourth Proportional to 20,882.40, 28,818.28 and 11,931.36

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Solution

The fourth proportional to 20,882.40, 28,818.28 and 11,931.36 is: 16,465.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,882.40 : 28,818.28 = 11,931.36 : x
  2. Step 2: Convert to fraction form
    20,882.40/28,818.28 = 11,931.36/x
  3. Step 3: Cross multiply
    20,882.40x = 28,818.28 × 11,931.36
  4. Step 4: Simplify right side
    20,882.40x = 343,841,273.26
  5. Step 5: Solve for x
    x = 343,841,273.26/20,882.40
  6. Step 6: Final answer
    x = 16,465.60

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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.