Home / 12,721.16-17,568.93-9,921.80

Finding the Fourth Proportional to 12,721.16, 17,568.93 and 9,921.80

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Solution

The fourth proportional to 12,721.16, 17,568.93 and 9,921.80 is: 13,702.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,721.16 : 17,568.93 = 9,921.80 : x
  2. Step 2: Convert to fraction form
    12,721.16/17,568.93 = 9,921.80/x
  3. Step 3: Cross multiply
    12,721.16x = 17,568.93 × 9,921.80
  4. Step 4: Simplify right side
    12,721.16x = 174,315,490.80
  5. Step 5: Solve for x
    x = 174,315,490.80/12,721.16
  6. Step 6: Final answer
    x = 13,702.80

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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.