Home / 28,990.72-39,999.99-18,376.48

Finding the Fourth Proportional to 28,990.72, 39,999.99 and 18,376.48

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Solution

The fourth proportional to 28,990.72, 39,999.99 and 18,376.48 is: 25,354.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,990.72 : 39,999.99 = 18,376.48 : x
  2. Step 2: Convert to fraction form
    28,990.72/39,999.99 = 18,376.48/x
  3. Step 3: Cross multiply
    28,990.72x = 39,999.99 × 18,376.48
  4. Step 4: Simplify right side
    28,990.72x = 735,059,016.24
  5. Step 5: Solve for x
    x = 735,059,016.24/28,990.72
  6. Step 6: Final answer
    x = 25,354.98

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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.