Home / 21,789.15-30,033.09-15,407.51

Finding the Fourth Proportional to 21,789.15, 30,033.09 and 15,407.51

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Solution

The fourth proportional to 21,789.15, 30,033.09 and 15,407.51 is: 21,236.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,789.15 : 30,033.09 = 15,407.51 : x
  2. Step 2: Convert to fraction form
    21,789.15/30,033.09 = 15,407.51/x
  3. Step 3: Cross multiply
    21,789.15x = 30,033.09 × 15,407.51
  4. Step 4: Simplify right side
    21,789.15x = 462,734,984.34
  5. Step 5: Solve for x
    x = 462,734,984.34/21,789.15
  6. Step 6: Final answer
    x = 21,236.95

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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.