Home / 21,853.17-30,156.17-12,897.40

Finding the Fourth Proportional to 21,853.17, 30,156.17 and 12,897.40

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Solution

The fourth proportional to 21,853.17, 30,156.17 and 12,897.40 is: 17,797.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,853.17 : 30,156.17 = 12,897.40 : x
  2. Step 2: Convert to fraction form
    21,853.17/30,156.17 = 12,897.40/x
  3. Step 3: Cross multiply
    21,853.17x = 30,156.17 × 12,897.40
  4. Step 4: Simplify right side
    21,853.17x = 388,936,186.96
  5. Step 5: Solve for x
    x = 388,936,186.96/21,853.17
  6. Step 6: Final answer
    x = 17,797.70

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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.