Home / 21,218.63-29,276.81-12,719.16

Finding the Fourth Proportional to 21,218.63, 29,276.81 and 12,719.16

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Solution

The fourth proportional to 21,218.63, 29,276.81 and 12,719.16 is: 17,549.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,218.63 : 29,276.81 = 12,719.16 : x
  2. Step 2: Convert to fraction form
    21,218.63/29,276.81 = 12,719.16/x
  3. Step 3: Cross multiply
    21,218.63x = 29,276.81 × 12,719.16
  4. Step 4: Simplify right side
    21,218.63x = 372,376,414.78
  5. Step 5: Solve for x
    x = 372,376,414.78/21,218.63
  6. Step 6: Final answer
    x = 17,549.51

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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.