Home / 21,272.64-29,355.83-13,319.25

Finding the Fourth Proportional to 21,272.64, 29,355.83 and 13,319.25

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Solution

The fourth proportional to 21,272.64, 29,355.83 and 13,319.25 is: 18,380.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,272.64 : 29,355.83 = 13,319.25 : x
  2. Step 2: Convert to fraction form
    21,272.64/29,355.83 = 13,319.25/x
  3. Step 3: Cross multiply
    21,272.64x = 29,355.83 × 13,319.25
  4. Step 4: Simplify right side
    21,272.64x = 390,997,572.13
  5. Step 5: Solve for x
    x = 390,997,572.13/21,272.64
  6. Step 6: Final answer
    x = 18,380.30

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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.