Home / 21,675.60-29,915.73-15,705.09

Finding the Fourth Proportional to 21,675.60, 29,915.73 and 15,705.09

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Solution

The fourth proportional to 21,675.60, 29,915.73 and 15,705.09 is: 21,675.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,675.60 : 29,915.73 = 15,705.09 : x
  2. Step 2: Convert to fraction form
    21,675.60/29,915.73 = 15,705.09/x
  3. Step 3: Cross multiply
    21,675.60x = 29,915.73 × 15,705.09
  4. Step 4: Simplify right side
    21,675.60x = 469,829,232.07
  5. Step 5: Solve for x
    x = 469,829,232.07/21,675.60
  6. Step 6: Final answer
    x = 21,675.49

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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.