Home / 21,048.96-31,570.08-12,620.16

Finding the Fourth Proportional to 21,048.96, 31,570.08 and 12,620.16

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Solution

The fourth proportional to 21,048.96, 31,570.08 and 12,620.16 is: 18,928.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,048.96 : 31,570.08 = 12,620.16 : x
  2. Step 2: Convert to fraction form
    21,048.96/31,570.08 = 12,620.16/x
  3. Step 3: Cross multiply
    21,048.96x = 31,570.08 × 12,620.16
  4. Step 4: Simplify right side
    21,048.96x = 398,419,460.81
  5. Step 5: Solve for x
    x = 398,419,460.81/21,048.96
  6. Step 6: Final answer
    x = 18,928.23

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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.