Home / 28,999.12-40,018.56-15,751.12

Finding the Fourth Proportional to 28,999.12, 40,018.56 and 15,751.12

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Solution

The fourth proportional to 28,999.12, 40,018.56 and 15,751.12 is: 21,736.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,999.12 : 40,018.56 = 15,751.12 : x
  2. Step 2: Convert to fraction form
    28,999.12/40,018.56 = 15,751.12/x
  3. Step 3: Cross multiply
    28,999.12x = 40,018.56 × 15,751.12
  4. Step 4: Simplify right side
    28,999.12x = 630,337,140.79
  5. Step 5: Solve for x
    x = 630,337,140.79/28,999.12
  6. Step 6: Final answer
    x = 21,736.42

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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.