Home / 21,218.32-29,261.04-15,470.56

Finding the Fourth Proportional to 21,218.32, 29,261.04 and 15,470.56

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Solution

The fourth proportional to 21,218.32, 29,261.04 and 15,470.56 is: 21,334.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,218.32 : 29,261.04 = 15,470.56 : x
  2. Step 2: Convert to fraction form
    21,218.32/29,261.04 = 15,470.56/x
  3. Step 3: Cross multiply
    21,218.32x = 29,261.04 × 15,470.56
  4. Step 4: Simplify right side
    21,218.32x = 452,684,674.98
  5. Step 5: Solve for x
    x = 452,684,674.98/21,218.32
  6. Step 6: Final answer
    x = 21,334.61

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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.