Home / 21,010.40-31,515.60-17,316.80

Finding the Fourth Proportional to 21,010.40, 31,515.60 and 17,316.80

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Solution

The fourth proportional to 21,010.40, 31,515.60 and 17,316.80 is: 25,975.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,010.40 : 31,515.60 = 17,316.80 : x
  2. Step 2: Convert to fraction form
    21,010.40/31,515.60 = 17,316.80/x
  3. Step 3: Cross multiply
    21,010.40x = 31,515.60 × 17,316.80
  4. Step 4: Simplify right side
    21,010.40x = 545,749,342.08
  5. Step 5: Solve for x
    x = 545,749,342.08/21,010.40
  6. Step 6: Final answer
    x = 25,975.20

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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.