Home / 15,385.02-21,231.36-9,729.87

Finding the Fourth Proportional to 15,385.02, 21,231.36 and 9,729.87

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Solution

The fourth proportional to 15,385.02, 21,231.36 and 9,729.87 is: 13,427.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,385.02 : 21,231.36 = 9,729.87 : x
  2. Step 2: Convert to fraction form
    15,385.02/21,231.36 = 9,729.87/x
  3. Step 3: Cross multiply
    15,385.02x = 21,231.36 × 9,729.87
  4. Step 4: Simplify right side
    15,385.02x = 206,578,372.72
  5. Step 5: Solve for x
    x = 206,578,372.72/15,385.02
  6. Step 6: Final answer
    x = 13,427.24

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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.