Home / 21,159.24-29,199.06-12,774.28

Finding the Fourth Proportional to 21,159.24, 29,199.06 and 12,774.28

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Solution

The fourth proportional to 21,159.24, 29,199.06 and 12,774.28 is: 17,628.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,159.24 : 29,199.06 = 12,774.28 : x
  2. Step 2: Convert to fraction form
    21,159.24/29,199.06 = 12,774.28/x
  3. Step 3: Cross multiply
    21,159.24x = 29,199.06 × 12,774.28
  4. Step 4: Simplify right side
    21,159.24x = 372,996,968.18
  5. Step 5: Solve for x
    x = 372,996,968.18/21,159.24
  6. Step 6: Final answer
    x = 17,628.09

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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.