Home / 28,530.78-39,372.45-15,955.50

Finding the Fourth Proportional to 28,530.78, 39,372.45 and 15,955.50

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Solution

The fourth proportional to 28,530.78, 39,372.45 and 15,955.50 is: 22,018.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,530.78 : 39,372.45 = 15,955.50 : x
  2. Step 2: Convert to fraction form
    28,530.78/39,372.45 = 15,955.50/x
  3. Step 3: Cross multiply
    28,530.78x = 39,372.45 × 15,955.50
  4. Step 4: Simplify right side
    28,530.78x = 628,207,125.98
  5. Step 5: Solve for x
    x = 628,207,125.98/28,530.78
  6. Step 6: Final answer
    x = 22,018.58

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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.