Home / 20,712.13-28,582.80-11,280.69

Finding the Fourth Proportional to 20,712.13, 28,582.80 and 11,280.69

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Solution

The fourth proportional to 20,712.13, 28,582.80 and 11,280.69 is: 15,567.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,712.13 : 28,582.80 = 11,280.69 : x
  2. Step 2: Convert to fraction form
    20,712.13/28,582.80 = 11,280.69/x
  3. Step 3: Cross multiply
    20,712.13x = 28,582.80 × 11,280.69
  4. Step 4: Simplify right side
    20,712.13x = 322,433,663.83
  5. Step 5: Solve for x
    x = 322,433,663.83/20,712.13
  6. Step 6: Final answer
    x = 15,567.39

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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.