Home / 21,399.72-29,534.40-11,970.24

Finding the Fourth Proportional to 21,399.72, 29,534.40 and 11,970.24

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Solution

The fourth proportional to 21,399.72, 29,534.40 and 11,970.24 is: 16,520.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,399.72 : 29,534.40 = 11,970.24 : x
  2. Step 2: Convert to fraction form
    21,399.72/29,534.40 = 11,970.24/x
  3. Step 3: Cross multiply
    21,399.72x = 29,534.40 × 11,970.24
  4. Step 4: Simplify right side
    21,399.72x = 353,533,856.26
  5. Step 5: Solve for x
    x = 353,533,856.26/21,399.72
  6. Step 6: Final answer
    x = 16,520.49

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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.