Home / 20,881.32-28,854.39-15,206.19

Finding the Fourth Proportional to 20,881.32, 28,854.39 and 15,206.19

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Solution

The fourth proportional to 20,881.32, 28,854.39 and 15,206.19 is: 21,012.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,881.32 : 28,854.39 = 15,206.19 : x
  2. Step 2: Convert to fraction form
    20,881.32/28,854.39 = 15,206.19/x
  3. Step 3: Cross multiply
    20,881.32x = 28,854.39 × 15,206.19
  4. Step 4: Simplify right side
    20,881.32x = 438,765,336.67
  5. Step 5: Solve for x
    x = 438,765,336.67/20,881.32
  6. Step 6: Final answer
    x = 21,012.34

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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.