Home / 28,220.15-38,914.75-19,719.17

Finding the Fourth Proportional to 28,220.15, 38,914.75 and 19,719.17

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Solution

The fourth proportional to 28,220.15, 38,914.75 and 19,719.17 is: 27,192.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,220.15 : 38,914.75 = 19,719.17 : x
  2. Step 2: Convert to fraction form
    28,220.15/38,914.75 = 19,719.17/x
  3. Step 3: Cross multiply
    28,220.15x = 38,914.75 × 19,719.17
  4. Step 4: Simplify right side
    28,220.15x = 767,366,654.74
  5. Step 5: Solve for x
    x = 767,366,654.74/28,220.15
  6. Step 6: Final answer
    x = 27,192.15

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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.