Home / 28,178.20-38,887.94-15,603.80

Finding the Fourth Proportional to 28,178.20, 38,887.94 and 15,603.80

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Solution

The fourth proportional to 28,178.20, 38,887.94 and 15,603.80 is: 21,534.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,178.20 : 38,887.94 = 15,603.80 : x
  2. Step 2: Convert to fraction form
    28,178.20/38,887.94 = 15,603.80/x
  3. Step 3: Cross multiply
    28,178.20x = 38,887.94 × 15,603.80
  4. Step 4: Simplify right side
    28,178.20x = 606,799,638.17
  5. Step 5: Solve for x
    x = 606,799,638.17/28,178.20
  6. Step 6: Final answer
    x = 21,534.36

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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.