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Finding the Fourth Proportional to 21,656.97, 29,894.57 and 12,711.98

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Solution

The fourth proportional to 21,656.97, 29,894.57 and 12,711.98 is: 17,547.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,656.97 : 29,894.57 = 12,711.98 : x
  2. Step 2: Convert to fraction form
    21,656.97/29,894.57 = 12,711.98/x
  3. Step 3: Cross multiply
    21,656.97x = 29,894.57 × 12,711.98
  4. Step 4: Simplify right side
    21,656.97x = 380,018,962.92
  5. Step 5: Solve for x
    x = 380,018,962.92/21,656.97
  6. Step 6: Final answer
    x = 17,547.19

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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.