Home / 21,133.93-31,699.06-12,811.50

Finding the Fourth Proportional to 21,133.93, 31,699.06 and 12,811.50

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Solution

The fourth proportional to 21,133.93, 31,699.06 and 12,811.50 is: 19,216.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,133.93 : 31,699.06 = 12,811.50 : x
  2. Step 2: Convert to fraction form
    21,133.93/31,699.06 = 12,811.50/x
  3. Step 3: Cross multiply
    21,133.93x = 31,699.06 × 12,811.50
  4. Step 4: Simplify right side
    21,133.93x = 406,112,507.19
  5. Step 5: Solve for x
    x = 406,112,507.19/21,133.93
  6. Step 6: Final answer
    x = 19,216.14

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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.