Home / 23,129.21-31,918.34-12,518.81

Finding the Fourth Proportional to 23,129.21, 31,918.34 and 12,518.81

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Solution

The fourth proportional to 23,129.21, 31,918.34 and 12,518.81 is: 17,275.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,129.21 : 31,918.34 = 12,518.81 : x
  2. Step 2: Convert to fraction form
    23,129.21/31,918.34 = 12,518.81/x
  3. Step 3: Cross multiply
    23,129.21x = 31,918.34 × 12,518.81
  4. Step 4: Simplify right side
    23,129.21x = 399,579,571.38
  5. Step 5: Solve for x
    x = 399,579,571.38/23,129.21
  6. Step 6: Final answer
    x = 17,275.98

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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.