Home / 28,120.74-38,805.20-15,543.06

Finding the Fourth Proportional to 28,120.74, 38,805.20 and 15,543.06

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Solution

The fourth proportional to 28,120.74, 38,805.20 and 15,543.06 is: 21,448.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,120.74 : 38,805.20 = 15,543.06 : x
  2. Step 2: Convert to fraction form
    28,120.74/38,805.20 = 15,543.06/x
  3. Step 3: Cross multiply
    28,120.74x = 38,805.20 × 15,543.06
  4. Step 4: Simplify right side
    28,120.74x = 603,151,551.91
  5. Step 5: Solve for x
    x = 603,151,551.91/28,120.74
  6. Step 6: Final answer
    x = 21,448.64

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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.