Home / 21,485.76-29,635.40-15,125.60

Finding the Fourth Proportional to 21,485.76, 29,635.40 and 15,125.60

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Solution

The fourth proportional to 21,485.76, 29,635.40 and 15,125.60 is: 20,862.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,485.76 : 29,635.40 = 15,125.60 : x
  2. Step 2: Convert to fraction form
    21,485.76/29,635.40 = 15,125.60/x
  3. Step 3: Cross multiply
    21,485.76x = 29,635.40 × 15,125.60
  4. Step 4: Simplify right side
    21,485.76x = 448,253,206.24
  5. Step 5: Solve for x
    x = 448,253,206.24/21,485.76
  6. Step 6: Final answer
    x = 20,862.80

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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.