Home / 21,721.74-29,975.18-12,290.52

Finding the Fourth Proportional to 21,721.74, 29,975.18 and 12,290.52

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Solution

The fourth proportional to 21,721.74, 29,975.18 and 12,290.52 is: 16,960.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,721.74 : 29,975.18 = 12,290.52 : x
  2. Step 2: Convert to fraction form
    21,721.74/29,975.18 = 12,290.52/x
  3. Step 3: Cross multiply
    21,721.74x = 29,975.18 × 12,290.52
  4. Step 4: Simplify right side
    21,721.74x = 368,410,549.29
  5. Step 5: Solve for x
    x = 368,410,549.29/21,721.74
  6. Step 6: Final answer
    x = 16,960.45

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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.