Home / 40,914.40-61,371.60-13,215.20

Finding the Fourth Proportional to 40,914.40, 61,371.60 and 13,215.20

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Solution

The fourth proportional to 40,914.40, 61,371.60 and 13,215.20 is: 19,822.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,914.40 : 61,371.60 = 13,215.20 : x
  2. Step 2: Convert to fraction form
    40,914.40/61,371.60 = 13,215.20/x
  3. Step 3: Cross multiply
    40,914.40x = 61,371.60 × 13,215.20
  4. Step 4: Simplify right side
    40,914.40x = 811,037,968.32
  5. Step 5: Solve for x
    x = 811,037,968.32/40,914.40
  6. Step 6: Final answer
    x = 19,822.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.