Home / 15,390.11-21,238.34-8,316.51

Finding the Fourth Proportional to 15,390.11, 21,238.34 and 8,316.51

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Solution

The fourth proportional to 15,390.11, 21,238.34 and 8,316.51 is: 11,476.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,390.11 : 21,238.34 = 8,316.51 : x
  2. Step 2: Convert to fraction form
    15,390.11/21,238.34 = 8,316.51/x
  3. Step 3: Cross multiply
    15,390.11x = 21,238.34 × 8,316.51
  4. Step 4: Simplify right side
    15,390.11x = 176,628,825.41
  5. Step 5: Solve for x
    x = 176,628,825.41/15,390.11
  6. Step 6: Final answer
    x = 11,476.78

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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.