Home / 20,365.12-28,065.84-15,881.80

Finding the Fourth Proportional to 20,365.12, 28,065.84 and 15,881.80

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Solution

The fourth proportional to 20,365.12, 28,065.84 and 15,881.80 is: 21,887.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,365.12 : 28,065.84 = 15,881.80 : x
  2. Step 2: Convert to fraction form
    20,365.12/28,065.84 = 15,881.80/x
  3. Step 3: Cross multiply
    20,365.12x = 28,065.84 × 15,881.80
  4. Step 4: Simplify right side
    20,365.12x = 445,736,057.71
  5. Step 5: Solve for x
    x = 445,736,057.71/20,365.12
  6. Step 6: Final answer
    x = 21,887.23

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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.