Home / 21,360.08-29,470.46-12,405.86

Finding the Fourth Proportional to 21,360.08, 29,470.46 and 12,405.86

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Solution

The fourth proportional to 21,360.08, 29,470.46 and 12,405.86 is: 17,116.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,360.08 : 29,470.46 = 12,405.86 : x
  2. Step 2: Convert to fraction form
    21,360.08/29,470.46 = 12,405.86/x
  3. Step 3: Cross multiply
    21,360.08x = 29,470.46 × 12,405.86
  4. Step 4: Simplify right side
    21,360.08x = 365,606,400.90
  5. Step 5: Solve for x
    x = 365,606,400.90/21,360.08
  6. Step 6: Final answer
    x = 17,116.34

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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.