Home / 21,719.28-29,970.81-12,767.16

Finding the Fourth Proportional to 21,719.28, 29,970.81 and 12,767.16

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Solution

The fourth proportional to 21,719.28, 29,970.81 and 12,767.16 is: 17,617.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,719.28 : 29,970.81 = 12,767.16 : x
  2. Step 2: Convert to fraction form
    21,719.28/29,970.81 = 12,767.16/x
  3. Step 3: Cross multiply
    21,719.28x = 29,970.81 × 12,767.16
  4. Step 4: Simplify right side
    21,719.28x = 382,642,126.60
  5. Step 5: Solve for x
    x = 382,642,126.60/21,719.28
  6. Step 6: Final answer
    x = 17,617.62

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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.