Home / 21,140.07-31,659.59-11,756.78

Finding the Fourth Proportional to 21,140.07, 31,659.59 and 11,756.78

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Solution

The fourth proportional to 21,140.07, 31,659.59 and 11,756.78 is: 17,607.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,140.07 : 31,659.59 = 11,756.78 : x
  2. Step 2: Convert to fraction form
    21,140.07/31,659.59 = 11,756.78/x
  3. Step 3: Cross multiply
    21,140.07x = 31,659.59 × 11,756.78
  4. Step 4: Simplify right side
    21,140.07x = 372,214,617.44
  5. Step 5: Solve for x
    x = 372,214,617.44/21,140.07
  6. Step 6: Final answer
    x = 17,607.07

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1.5x scale

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.