Home / 21,581.37-29,780.16-15,919.17

Finding the Fourth Proportional to 21,581.37, 29,780.16 and 15,919.17

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Solution

The fourth proportional to 21,581.37, 29,780.16 and 15,919.17 is: 21,966.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,581.37 : 29,780.16 = 15,919.17 : x
  2. Step 2: Convert to fraction form
    21,581.37/29,780.16 = 15,919.17/x
  3. Step 3: Cross multiply
    21,581.37x = 29,780.16 × 15,919.17
  4. Step 4: Simplify right side
    21,581.37x = 474,075,258.29
  5. Step 5: Solve for x
    x = 474,075,258.29/21,581.37
  6. Step 6: Final answer
    x = 21,966.88

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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.