Home / 21,908.95-30,233.05-12,957.23

Finding the Fourth Proportional to 21,908.95, 30,233.05 and 12,957.23

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Solution

The fourth proportional to 21,908.95, 30,233.05 and 12,957.23 is: 17,880.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,908.95 : 30,233.05 = 12,957.23 : x
  2. Step 2: Convert to fraction form
    21,908.95/30,233.05 = 12,957.23/x
  3. Step 3: Cross multiply
    21,908.95x = 30,233.05 × 12,957.23
  4. Step 4: Simplify right side
    21,908.95x = 391,736,625.64
  5. Step 5: Solve for x
    x = 391,736,625.64/21,908.95
  6. Step 6: Final answer
    x = 17,880.21

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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.