Home / 20,340.37-28,069.77-11,387.89

Finding the Fourth Proportional to 20,340.37, 28,069.77 and 11,387.89

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Solution

The fourth proportional to 20,340.37, 28,069.77 and 11,387.89 is: 15,715.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,340.37 : 28,069.77 = 11,387.89 : x
  2. Step 2: Convert to fraction form
    20,340.37/28,069.77 = 11,387.89/x
  3. Step 3: Cross multiply
    20,340.37x = 28,069.77 × 11,387.89
  4. Step 4: Simplify right side
    20,340.37x = 319,655,341.21
  5. Step 5: Solve for x
    x = 319,655,341.21/20,340.37
  6. Step 6: Final answer
    x = 15,715.32

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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.