Home / 20,840.52-28,773.84-12,345.39

Finding the Fourth Proportional to 20,840.52, 28,773.84 and 12,345.39

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Solution

The fourth proportional to 20,840.52, 28,773.84 and 12,345.39 is: 17,044.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,840.52 : 28,773.84 = 12,345.39 : x
  2. Step 2: Convert to fraction form
    20,840.52/28,773.84 = 12,345.39/x
  3. Step 3: Cross multiply
    20,840.52x = 28,773.84 × 12,345.39
  4. Step 4: Simplify right side
    20,840.52x = 355,224,276.60
  5. Step 5: Solve for x
    x = 355,224,276.60/20,840.52
  6. Step 6: Final answer
    x = 17,044.89

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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.