Home / 20,663.51-28,516.52-12,708.36

Finding the Fourth Proportional to 20,663.51, 28,516.52 and 12,708.36

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Solution

The fourth proportional to 20,663.51, 28,516.52 and 12,708.36 is: 17,538.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,663.51 : 28,516.52 = 12,708.36 : x
  2. Step 2: Convert to fraction form
    20,663.51/28,516.52 = 12,708.36/x
  3. Step 3: Cross multiply
    20,663.51x = 28,516.52 × 12,708.36
  4. Step 4: Simplify right side
    20,663.51x = 362,398,233.88
  5. Step 5: Solve for x
    x = 362,398,233.88/20,663.51
  6. Step 6: Final answer
    x = 17,538.08

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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.