Home / 31,619.78-43,655.63-20,294.16

Finding the Fourth Proportional to 31,619.78, 43,655.63 and 20,294.16

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Solution

The fourth proportional to 31,619.78, 43,655.63 and 20,294.16 is: 28,018.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,619.78 : 43,655.63 = 20,294.16 : x
  2. Step 2: Convert to fraction form
    31,619.78/43,655.63 = 20,294.16/x
  3. Step 3: Cross multiply
    31,619.78x = 43,655.63 × 20,294.16
  4. Step 4: Simplify right side
    31,619.78x = 885,954,340.12
  5. Step 5: Solve for x
    x = 885,954,340.12/31,619.78
  6. Step 6: Final answer
    x = 28,018.99

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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.