Home / 21,507.20-29,686.74-12,558.32

Finding the Fourth Proportional to 21,507.20, 29,686.74 and 12,558.32

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Solution

The fourth proportional to 21,507.20, 29,686.74 and 12,558.32 is: 17,334.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,507.20 : 29,686.74 = 12,558.32 : x
  2. Step 2: Convert to fraction form
    21,507.20/29,686.74 = 12,558.32/x
  3. Step 3: Cross multiply
    21,507.20x = 29,686.74 × 12,558.32
  4. Step 4: Simplify right side
    21,507.20x = 372,815,580.68
  5. Step 5: Solve for x
    x = 372,815,580.68/21,507.20
  6. Step 6: Final answer
    x = 17,334.45

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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.