Home / 21,763.76-30,036.80-12,812.08

Finding the Fourth Proportional to 21,763.76, 30,036.80 and 12,812.08

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Solution

The fourth proportional to 21,763.76, 30,036.80 and 12,812.08 is: 17,682.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,763.76 : 30,036.80 = 12,812.08 : x
  2. Step 2: Convert to fraction form
    21,763.76/30,036.80 = 12,812.08/x
  3. Step 3: Cross multiply
    21,763.76x = 30,036.80 × 12,812.08
  4. Step 4: Simplify right side
    21,763.76x = 384,833,884.54
  5. Step 5: Solve for x
    x = 384,833,884.54/21,763.76
  6. Step 6: Final answer
    x = 17,682.33

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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.