Home / 20,828.24-28,740.48-11,875.76

Finding the Fourth Proportional to 20,828.24, 28,740.48 and 11,875.76

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Solution

The fourth proportional to 20,828.24, 28,740.48 and 11,875.76 is: 16,387.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,828.24 : 28,740.48 = 11,875.76 : x
  2. Step 2: Convert to fraction form
    20,828.24/28,740.48 = 11,875.76/x
  3. Step 3: Cross multiply
    20,828.24x = 28,740.48 × 11,875.76
  4. Step 4: Simplify right side
    20,828.24x = 341,315,042.76
  5. Step 5: Solve for x
    x = 341,315,042.76/20,828.24
  6. Step 6: Final answer
    x = 16,387.13

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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.