Home / 28,254.48-38,991.44-15,680.04

Finding the Fourth Proportional to 28,254.48, 38,991.44 and 15,680.04

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Solution

The fourth proportional to 28,254.48, 38,991.44 and 15,680.04 is: 21,638.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,254.48 : 38,991.44 = 15,680.04 : x
  2. Step 2: Convert to fraction form
    28,254.48/38,991.44 = 15,680.04/x
  3. Step 3: Cross multiply
    28,254.48x = 38,991.44 × 15,680.04
  4. Step 4: Simplify right side
    28,254.48x = 611,387,338.86
  5. Step 5: Solve for x
    x = 611,387,338.86/28,254.48
  6. Step 6: Final answer
    x = 21,638.60

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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.