Home / 31,515.60-43,507.08-21,496.08

Finding the Fourth Proportional to 31,515.60, 43,507.08 and 21,496.08

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Solution

The fourth proportional to 31,515.60, 43,507.08 and 21,496.08 is: 29,675.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,515.60 : 43,507.08 = 21,496.08 : x
  2. Step 2: Convert to fraction form
    31,515.60/43,507.08 = 21,496.08/x
  3. Step 3: Cross multiply
    31,515.60x = 43,507.08 × 21,496.08
  4. Step 4: Simplify right side
    31,515.60x = 935,231,672.25
  5. Step 5: Solve for x
    x = 935,231,672.25/31,515.60
  6. Step 6: Final answer
    x = 29,675.20

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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.