Home / 21,322.48-31,985.40-7,289.20

Finding the Fourth Proportional to 21,322.48, 31,985.40 and 7,289.20

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Solution

The fourth proportional to 21,322.48, 31,985.40 and 7,289.20 is: 10,934.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,322.48 : 31,985.40 = 7,289.20 : x
  2. Step 2: Convert to fraction form
    21,322.48/31,985.40 = 7,289.20/x
  3. Step 3: Cross multiply
    21,322.48x = 31,985.40 × 7,289.20
  4. Step 4: Simplify right side
    21,322.48x = 233,147,977.68
  5. Step 5: Solve for x
    x = 233,147,977.68/21,322.48
  6. Step 6: Final answer
    x = 10,934.37

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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.