Home / 21,301.38-31,969.08-12,543.66

Finding the Fourth Proportional to 21,301.38, 31,969.08 and 12,543.66

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Solution

The fourth proportional to 21,301.38, 31,969.08 and 12,543.66 is: 18,825.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,301.38 : 31,969.08 = 12,543.66 : x
  2. Step 2: Convert to fraction form
    21,301.38/31,969.08 = 12,543.66/x
  3. Step 3: Cross multiply
    21,301.38x = 31,969.08 × 12,543.66
  4. Step 4: Simplify right side
    21,301.38x = 401,009,270.03
  5. Step 5: Solve for x
    x = 401,009,270.03/21,301.38
  6. Step 6: Final answer
    x = 18,825.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.