Home / 21,168.16-29,205.84-15,580.96

Finding the Fourth Proportional to 21,168.16, 29,205.84 and 15,580.96

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Solution

The fourth proportional to 21,168.16, 29,205.84 and 15,580.96 is: 21,497.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,168.16 : 29,205.84 = 15,580.96 : x
  2. Step 2: Convert to fraction form
    21,168.16/29,205.84 = 15,580.96/x
  3. Step 3: Cross multiply
    21,168.16x = 29,205.84 × 15,580.96
  4. Step 4: Simplify right side
    21,168.16x = 455,055,024.81
  5. Step 5: Solve for x
    x = 455,055,024.81/21,168.16
  6. Step 6: Final answer
    x = 21,497.15

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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.