Home / 19,778.73-27,324.32-12,988.86

Finding the Fourth Proportional to 19,778.73, 27,324.32 and 12,988.86

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Solution

The fourth proportional to 19,778.73, 27,324.32 and 12,988.86 is: 17,944.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,778.73 : 27,324.32 = 12,988.86 : x
  2. Step 2: Convert to fraction form
    19,778.73/27,324.32 = 12,988.86/x
  3. Step 3: Cross multiply
    19,778.73x = 27,324.32 × 12,988.86
  4. Step 4: Simplify right side
    19,778.73x = 354,911,702.13
  5. Step 5: Solve for x
    x = 354,911,702.13/19,778.73
  6. Step 6: Final answer
    x = 17,944.11

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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.