Home / 21,420.02-29,560.54-11,859.90

Finding the Fourth Proportional to 21,420.02, 29,560.54 and 11,859.90

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Solution

The fourth proportional to 21,420.02, 29,560.54 and 11,859.90 is: 16,367.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,420.02 : 29,560.54 = 11,859.90 : x
  2. Step 2: Convert to fraction form
    21,420.02/29,560.54 = 11,859.90/x
  3. Step 3: Cross multiply
    21,420.02x = 29,560.54 × 11,859.90
  4. Step 4: Simplify right side
    21,420.02x = 350,585,126.41
  5. Step 5: Solve for x
    x = 350,585,126.41/21,420.02
  6. Step 6: Final answer
    x = 16,367.17

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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.