Home / 15,390.36-21,243.96-9,018.99

Finding the Fourth Proportional to 15,390.36, 21,243.96 and 9,018.99

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Solution

The fourth proportional to 15,390.36, 21,243.96 and 9,018.99 is: 12,449.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,390.36 : 21,243.96 = 9,018.99 : x
  2. Step 2: Convert to fraction form
    15,390.36/21,243.96 = 9,018.99/x
  3. Step 3: Cross multiply
    15,390.36x = 21,243.96 × 9,018.99
  4. Step 4: Simplify right side
    15,390.36x = 191,599,062.80
  5. Step 5: Solve for x
    x = 191,599,062.80/15,390.36
  6. Step 6: Final answer
    x = 12,449.29

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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.