Home / 15,644.64-21,572.92-12,790.68

Finding the Fourth Proportional to 15,644.64, 21,572.92 and 12,790.68

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Solution

The fourth proportional to 15,644.64, 21,572.92 and 12,790.68 is: 17,637.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,644.64 : 21,572.92 = 12,790.68 : x
  2. Step 2: Convert to fraction form
    15,644.64/21,572.92 = 12,790.68/x
  3. Step 3: Cross multiply
    15,644.64x = 21,572.92 × 12,790.68
  4. Step 4: Simplify right side
    15,644.64x = 275,932,316.39
  5. Step 5: Solve for x
    x = 275,932,316.39/15,644.64
  6. Step 6: Final answer
    x = 17,637.50

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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.