Home / 15,678.92-21,645.30-12,086.01

Finding the Fourth Proportional to 15,678.92, 21,645.30 and 12,086.01

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Solution

The fourth proportional to 15,678.92, 21,645.30 and 12,086.01 is: 16,685.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,678.92 : 21,645.30 = 12,086.01 : x
  2. Step 2: Convert to fraction form
    15,678.92/21,645.30 = 12,086.01/x
  3. Step 3: Cross multiply
    15,678.92x = 21,645.30 × 12,086.01
  4. Step 4: Simplify right side
    15,678.92x = 261,605,323.58
  5. Step 5: Solve for x
    x = 261,605,323.58/15,678.92
  6. Step 6: Final answer
    x = 16,685.17

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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.