Home / 20,867.40-28,804.86-13,803.48

Finding the Fourth Proportional to 20,867.40, 28,804.86 and 13,803.48

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Solution

The fourth proportional to 20,867.40, 28,804.86 and 13,803.48 is: 19,053.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,867.40 : 28,804.86 = 13,803.48 : x
  2. Step 2: Convert to fraction form
    20,867.40/28,804.86 = 13,803.48/x
  3. Step 3: Cross multiply
    20,867.40x = 28,804.86 × 13,803.48
  4. Step 4: Simplify right side
    20,867.40x = 397,607,308.91
  5. Step 5: Solve for x
    x = 397,607,308.91/20,867.40
  6. Step 6: Final answer
    x = 19,053.99

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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.