Home / 21,290.02-29,387.04-13,736.56

Finding the Fourth Proportional to 21,290.02, 29,387.04 and 13,736.56

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Solution

The fourth proportional to 21,290.02, 29,387.04 and 13,736.56 is: 18,960.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,290.02 : 29,387.04 = 13,736.56 : x
  2. Step 2: Convert to fraction form
    21,290.02/29,387.04 = 13,736.56/x
  3. Step 3: Cross multiply
    21,290.02x = 29,387.04 × 13,736.56
  4. Step 4: Simplify right side
    21,290.02x = 403,676,838.18
  5. Step 5: Solve for x
    x = 403,676,838.18/21,290.02
  6. Step 6: Final answer
    x = 18,960.85

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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.