Home / 20,712.23-28,582.88-11,280.80

Finding the Fourth Proportional to 20,712.23, 28,582.88 and 11,280.80

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Solution

The fourth proportional to 20,712.23, 28,582.88 and 11,280.80 is: 15,567.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,712.23 : 28,582.88 = 11,280.80 : x
  2. Step 2: Convert to fraction form
    20,712.23/28,582.88 = 11,280.80/x
  3. Step 3: Cross multiply
    20,712.23x = 28,582.88 × 11,280.80
  4. Step 4: Simplify right side
    20,712.23x = 322,437,702.16
  5. Step 5: Solve for x
    x = 322,437,702.16/20,712.23
  6. Step 6: Final answer
    x = 15,567.50

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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.