Home / 21,333.12-29,426.40-15,355.32

Finding the Fourth Proportional to 21,333.12, 29,426.40 and 15,355.32

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Solution

The fourth proportional to 21,333.12, 29,426.40 and 15,355.32 is: 21,180.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,333.12 : 29,426.40 = 15,355.32 : x
  2. Step 2: Convert to fraction form
    21,333.12/29,426.40 = 15,355.32/x
  3. Step 3: Cross multiply
    21,333.12x = 29,426.40 × 15,355.32
  4. Step 4: Simplify right side
    21,333.12x = 451,851,788.45
  5. Step 5: Solve for x
    x = 451,851,788.45/21,333.12
  6. Step 6: Final answer
    x = 21,180.76

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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.