Home / 28,886.12-39,862.86-15,638.12

Finding the Fourth Proportional to 28,886.12, 39,862.86 and 15,638.12

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Solution

The fourth proportional to 28,886.12, 39,862.86 and 15,638.12 is: 21,580.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,886.12 : 39,862.86 = 15,638.12 : x
  2. Step 2: Convert to fraction form
    28,886.12/39,862.86 = 15,638.12/x
  3. Step 3: Cross multiply
    28,886.12x = 39,862.86 × 15,638.12
  4. Step 4: Simplify right side
    28,886.12x = 623,380,188.22
  5. Step 5: Solve for x
    x = 623,380,188.22/28,886.12
  6. Step 6: Final answer
    x = 21,580.61

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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.