Home / 21,356.10-31,985.55-10,955.70

Finding the Fourth Proportional to 21,356.10, 31,985.55 and 10,955.70

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Solution

The fourth proportional to 21,356.10, 31,985.55 and 10,955.70 is: 16,408.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,356.10 : 31,985.55 = 10,955.70 : x
  2. Step 2: Convert to fraction form
    21,356.10/31,985.55 = 10,955.70/x
  3. Step 3: Cross multiply
    21,356.10x = 31,985.55 × 10,955.70
  4. Step 4: Simplify right side
    21,356.10x = 350,424,090.14
  5. Step 5: Solve for x
    x = 350,424,090.14/21,356.10
  6. Step 6: Final answer
    x = 16,408.62

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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.