Home / 21,780.50-30,055.47-12,348.86

Finding the Fourth Proportional to 21,780.50, 30,055.47 and 12,348.86

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Solution

The fourth proportional to 21,780.50, 30,055.47 and 12,348.86 is: 17,040.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,780.50 : 30,055.47 = 12,348.86 : x
  2. Step 2: Convert to fraction form
    21,780.50/30,055.47 = 12,348.86/x
  3. Step 3: Cross multiply
    21,780.50x = 30,055.47 × 12,348.86
  4. Step 4: Simplify right side
    21,780.50x = 371,150,791.26
  5. Step 5: Solve for x
    x = 371,150,791.26/21,780.50
  6. Step 6: Final answer
    x = 17,040.51

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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.