Home / 28,178.34-38,887.28-15,603.09

Finding the Fourth Proportional to 28,178.34, 38,887.28 and 15,603.09

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Solution

The fourth proportional to 28,178.34, 38,887.28 and 15,603.09 is: 21,532.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,178.34 : 38,887.28 = 15,603.09 : x
  2. Step 2: Convert to fraction form
    28,178.34/38,887.28 = 15,603.09/x
  3. Step 3: Cross multiply
    28,178.34x = 38,887.28 × 15,603.09
  4. Step 4: Simplify right side
    28,178.34x = 606,761,729.70
  5. Step 5: Solve for x
    x = 606,761,729.70/28,178.34
  6. Step 6: Final answer
    x = 21,532.91

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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.