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Finding the Fourth Proportional to 21,717.68, 29,966.54 and 12,767.00

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Solution

The fourth proportional to 21,717.68, 29,966.54 and 12,767.00 is: 17,616.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,717.68 : 29,966.54 = 12,767.00 : x
  2. Step 2: Convert to fraction form
    21,717.68/29,966.54 = 12,767.00/x
  3. Step 3: Cross multiply
    21,717.68x = 29,966.54 × 12,767.00
  4. Step 4: Simplify right side
    21,717.68x = 382,582,602.51
  5. Step 5: Solve for x
    x = 382,582,602.51/21,717.68
  6. Step 6: Final answer
    x = 17,616.19

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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.