Home / 21,997.02-30,348.86-13,490.40

Finding the Fourth Proportional to 21,997.02, 30,348.86 and 13,490.40

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Solution

The fourth proportional to 21,997.02, 30,348.86 and 13,490.40 is: 18,612.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,997.02 : 30,348.86 = 13,490.40 : x
  2. Step 2: Convert to fraction form
    21,997.02/30,348.86 = 13,490.40/x
  3. Step 3: Cross multiply
    21,997.02x = 30,348.86 × 13,490.40
  4. Step 4: Simplify right side
    21,997.02x = 409,418,260.94
  5. Step 5: Solve for x
    x = 409,418,260.94/21,997.02
  6. Step 6: Final answer
    x = 18,612.44

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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.